#include<bits/stdc++.h>
using namespace std;

#define int long long

#define rep(i,n) for(int i=0;i<(n);i++)
#define pb push_back
#define all(v) (v).begin(),(v).end()
#define fi first
#define se second
typedef vector<int>vint;
typedef pair<int,int>pint;
typedef vector<pint>vpint;

template<typename A,typename B>inline void chmin(A &a,B b){if(a>b)a=b;}
template<typename A,typename B>inline void chmax(A &a,B b){if(a<b)a=b;}

int N;
int par[20][111111];
vector<pint>G[111111];
int dep[111111],cost[111111];

void dfs(int v,int p,int d,int c){
	dep[v]=d;
	par[0][v]=p;
	cost[v]=c;
	for(auto e:G[v]){
		if(e.fi==p)continue;
		dfs(e.fi,v,d+1,c+e.se);
	}
}

int lca(int u,int v){
	if(dep[u]<dep[v])swap(u,v);
	rep(i,20)if((dep[u]-dep[v])>>i&1)u=par[i][u];
	if(u==v)return u;
	for(int i=19;i>=0;i--)if(par[i][u]!=par[i][v])u=par[i][u],v=par[i][v];
	return par[0][u];
}

inline int calc(int x,int y){
	int l=lca(x,y);
	return cost[x]+cost[y]-2*cost[l];
}
signed main(){
	scanf("%lld",&N);
	rep(i,N-1){
		int a,b,c;
		scanf("%lld%lld%lld",&a,&b,&c);
		G[a].pb({b,c});
		G[b].pb({a,c});
	}

	dfs(0,-1,0,0);
	rep(i,19){
		rep(j,N){
			if(par[i][j]==-1)par[i+1][j]=-1;
			else par[i+1][j]=par[i][par[i][j]];
		}
	}

	int Q;scanf("%lld",&Q);
	while(Q--){
		vint x(3);
		rep(i,3)scanf("%lld",&x[i]);

		vpint ls;
		rep(i,3)for(int j=i+1;j<3;j++){
			int l=lca(x[i],x[j]);
			ls.pb({dep[l],l});
		}
		sort(all(ls));
		int l=ls[2].se;
		int ans=0;
		rep(i,3)ans+=calc(x[i],l);
		printf("%lld\n",ans);
	}
	return 0;
}