#ifdef t9unkubj
#include"template.h"
//#include"template_no_debug.h"
#else
#undef _GLIBCXX_DEBUG
#pragma GCC optimize("O3")
#define dbg(...) 199958
using namespace std;
#include<bits/stdc++.h>
using uint=unsigned;
using ll=long long;
using ull=unsigned long long;
using ld=long double;
using pii=pair<int,int>;
using pll=pair<ll,ll>;
template<class T>using vc=vector<T>;
template<class T>using vvc=vc<vc<T>>;
template<class T>using vvvc=vvc<vc<T>>;
using vi=vc<int>;
using vvi=vc<vi>;
using vvvi=vc<vvi>;
using vl=vc<ll>;
using vvl=vc<vl>;
using vvvl=vc<vvl>;
template<class T>using smpq=priority_queue<T,vector<T>,greater<T>>;
template<class T>using bipq=priority_queue<T>;
#define rep(i,n) for(ll i=0;i<(ll)(n);i++)
#define REP(i,j,n) for(ll i=(j);i<(ll)(n);i++)
#define DREP(i,n,m) for(ll i=(n);i>=(m);i--)
#define drep(i,n) for(ll i=((n)-1);i>=0;i--)
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
#define mp make_pair
#define pb push_back
#define eb emplace_back
#define fi first
#define se second
#define is insert
#define bg begin()
#define ed end()
void scan(int&a) { cin >> a; }
void scan(ll&a) { cin >> a; }
void scan(string&a) { cin >> a; }
void scan(char&a) { cin >> a; }
void scan(uint&a) { cin >> a; }
void scan(ull&a) { cin >> a; }
void scan(bool&a) { cin >> a; }
void scan(ld&a){ cin>> a;}
template<class T> void scan(vector<T>&a) { for(auto&x:a) scan(x); }
void read() {}
template<class Head, class... Tail> void read(Head&head, Tail&... tail) { scan(head); read(tail...); }
#define INT(...) int __VA_ARGS__; read(__VA_ARGS__);
#define LL(...) ll __VA_ARGS__; read(__VA_ARGS__);
#define ULL(...) ull __VA_ARGS__; read(__VA_ARGS__);
#define STR(...) string __VA_ARGS__; read(__VA_ARGS__);
#define CHR(...) char __VA_ARGS__; read(__VA_ARGS__);
#define DBL(...) double __VA_ARGS__; read(__VA_ARGS__);
#define LD(...) ld __VA_ARGS__; read(__VA_ARGS__);
#define VC(type, name, ...) vector<type> name(__VA_ARGS__); read(name);
#define VVC(type, name, size, ...) vector<vector<type>> name(size, vector<type>(__VA_ARGS__)); read(name);
void print(int a) { cout << a; }
void print(ll a) { cout << a; }
void print(string a) { cout << a; }
void print(char a) { cout << a; }
void print(uint a) { cout << a; }
void print(bool a) { cout << a; }
void print(ull a) { cout << a; }
void print(double a) { cout << a; }
void print(ld a){ cout<< a; }
template<class T> void print(vector<T>a) { for(int i=0;i<(int)a.size();i++){if(i)cout<<" ";print(a[i]);}cout<<endl;}
void PRT() { cout <<endl; return ; }
template<class T> void PRT(T a) { print(a); cout <<endl; return; }
template<class Head, class... Tail> void PRT(Head head, Tail ... tail) { print(head); cout << " "; PRT(tail...); return; }
template<class T,class F>
bool chmin(T &x, F y){
    if(x>y){
        x=y;
        return true;
    }
    return false;
}
template<class T, class F>
bool chmax(T &x, F y){
    if(x<y){
        x=y;
        return true;
    }
    return false;
}
void YesNo(bool b){
    cout<<(b?"Yes":"No")<<endl;
}
void Yes(){
    cout<<"Yes"<<endl;
}
void No(){
    cout<<"No"<<endl;
}
template<class T>
int popcount(T n){
    return __builtin_popcountll(n);
}
template<class T>
T sum(vc<T>&a){
    return accumulate(all(a),T(0));
}
template<class T>
T max(vc<T>&a){
    return *max_element(all(a));
}
template<class T>
T min(vc<T>&a){
    return *min_element(all(a));
}
template<class T>
void unique(vc<T>&a){
    a.erase(unique(all(a)),a.end());
}
vvi readgraph(int n,int m,int off = -1){
    vvi g(n);
    rep(i, m){
        int u,v;
        cin>>u>>v;
        u+=off,v+=off;
        g[u].push_back(v);
        g[v].push_back(u);
    }
    return g;
}
vvi readtree(int n,int off=-1){
    return readgraph(n,n-1,off);
}
template<class T>
vc<T> presum(vc<T> &a){
    vc<T> ret(a.size()+1);
    rep(i,a.size())ret[i+1]=ret[i]+a[i];
    return ret;
}
template<class T, class F>
vc<T> &operator+=(vc<T> &a,F b){
    for (auto&v:a)v += b;
    return a;
}
template<class T, class F>
vc<T> &operator-=(vc<T>&a,F b){
    for (auto&v:a)v-=b;
    return a;
}
template<class T, class F>
vc<T> &operator*=(vc<T>&a,F b){
    for (auto&v:a)v*=b;
    return a;
}
#endif
double pass_time=0;
#include<vector>
#include<cassert>
#include<algorithm>
struct HLD{
	int n;
    std::vector<int>depth,head,siz_,par,in,out;
    std::vector<std::vector<int>>g,c;
    HLD(int n):n(n),depth(n),head(n),siz_(n,1),in(n),out(n),g(n),c(n){}
    HLD(int n,std::vector<std::vector<int>>g):n(n),depth(n),head(n),siz_(n,1),in(n),out(n),g(g),c(n){}
    void add_edge(int u,int v,bool d=0){
        g[u].emplace_back(v);
		if(d)g[v].emplace_back(u);
    }
    void init_dfs1(int now,int pre){
        for(int &x:g[now]){
			if(x==pre)continue;
			c[now].emplace_back(x);
            depth[x]=depth[now]+1;
            par[x]=now;
            init_dfs1(x,now);
            siz_[now]+=siz_[x];
        }
    }
    void init_dfs2(int now,int pre,int&order){
		in[now]=order++;
        for(int i=0;i<(int)c[now].size();i++){
            if(siz_[c[now][0]]<siz_[c[now][i]])std::swap(c[now][0],c[now][i]);
        }
        for(int x:c[now]){
            if(x==c[now][0])head[x]=head[now];
            else head[x]=x;
            init_dfs2(x,now,order);
        }
		out[now]=order++;
    }
    void init(int root=0){//rootからの有向辺にになることに注意
		par=head=std::vector<int>(n,root);
        int order{};
        init_dfs1(root,-1);
        init_dfs2(root,-1,order);
    }
    int lca(int u,int v){//O(logN) u,vのlcaを取得する
        if(head[u]==head[v])return (depth[u]>depth[v]?v:u);
        if(depth[head[u]]>depth[head[v]])std::swap(u,v);
        v=par[head[v]];
        return lca(u,v);
    }
    int f1(int a){//入った時間を返すO(1)
        return in[a];
    }
    int f2(int a){//出た時間を返すO(1)
        return out[a];
    }
    int dis(int u,int v){//uとvの最短距離を求めるO(logN)
        assert(0<=u&&u<n);
        assert(0<=v&&v<n);
        return depth[u]+depth[v]-2*depth[lca(u,v)];
    }
    template<class T,class G>
    void set(int u,T&seg,G x){
        seg.set(f1(u),x);
    }
    template<class T,class G>
    G prod(int u,int v,bool edge,T&seg){//[u,v]の演算結果を取得する,G>ret T>seg木　O(log^2N)
        G sml=seg.e,smr=seg.e;
        while(1){
            if(in[u]>in[v])swap(u,v),swap(sml,smr);
            if(head[u]==head[v])break;
            smr=seg.op(smr,seg.prod(in[head[v]],in[v]+1));
            v=par[head[v]];
        }
        return seg.op(sml,seg.op(smr,seg.prod(in[u]+edge,in[v]+1)));
    }
};
void solve(){
    INT(n,k);
    vvc<pll>g(n);
    HLD hld(n);
    rep(i,n-1){
        INT(a,b,c);
        g[--a].pb({--b,c});
        g[b].pb({a,c});
        hld.add_edge(a,b,1);
    }
    hld.init();

    vvi vs(k);
    vi p(k);
    rep(i,k){
        INT(m);
        cin>>p[i];
        rep(j,m){
            INT(x);
            vs[i].pb(--x);
        }
    }
    vvc<ll>cost(k,vc<ll>(k));
    vl md1(n);
    function<void(int,int)>dfs=[&](int u,int v){
        for(auto&[x,w]:g[u]){
            if(x==v)continue;
            md1[x]=md1[u]+w;
            dfs(x,u);
        }
    };
    dfs(0,-1);
    vvl md(k);
    rep(i,k){
        smpq<pll>que;
        vl md_(n,1e18);
        for(auto x:vs[i]){
            que.push({0,x});
            md_[x]=0;
        }
        while(que.size()){
            auto [p,q]=que.top();que.pop();
            if(md_[q]!=p)continue;
            for(auto&[x,w]:g[q]){
                if(chmin(md_[x],p+w))que.push({md_[x],x});
            }
        }
        md[i]=md_;
        rep(j,k){
            ll res=1e18;
            for(auto x:vs[j]){
                chmin(res,md_[x]);
            }
            cost[i][j]=res;
        }
    }
    auto Dist=[&](int u,int v){
        return md1[u]+md1[v]-md1[hld.lca(u,v)]*2;
    };
    INT(q);
    while(q--){
        INT(u,v);
        --u,--v;
        vl md2(k+2,1e18);
        md2[k]=0;
        smpq<pll>que;
        que.push({0,k});
        while(que.size()){
            auto [dist,q]=que.top();que.pop();
            if(md2[q]!=dist)continue;
            rep(i,k){
                if(q==k){
                    ll cost=md[i][u]+p[i];
                    if(chmin(md2[i],dist+cost))que.push({md2[i],i});
                }else if(q==k+1){
                    continue;
                }else{
                    ll cost1=cost[i][q]+p[i];
                    if(chmin(md2[i],dist+cost1))que.push({md2[i],i});
                }
            }
            if(q==k){
                if(chmin(md2[k+1],dist+Dist(u,v)))que.push({md2[k+1],k+1});
            }
            if(q<k){
                if(chmin(md2[k+1],dist+md[q][v]))que.push({md2[k+1],k+1});
            }
        }
        dbg(md[0][4]);
        dbg(md2);
        PRT(md2[k+1]);
    }
}
signed main(){
    cin.tie(0)->sync_with_stdio(0);
    pass_time=clock();
    int t=1;
    //cin>>t;
    while(t--)solve();
    pass_time=clock()-pass_time;
    dbg(pass_time/CLOCKS_PER_SEC);
}