#include <bits/stdc++.h>
#define rep(i, a, n) for(int i = a; i < n; i++)
#define int long long
using namespace std;
typedef pair<int, int> P;
const int mod = 1000000007;
const int INF = 1e18;

struct LowestCommonAncestor{
    const int MAX_LOG_V = 50;
    vector<vector<int> > G, parent;
    int root = 0, V;
    vector<int> depth;
    LowestCommonAncestor(int _V){
        V = _V;
        G.resize(V);
        parent.resize(MAX_LOG_V, vector<int>(V));
        depth.resize(V);
    }
    void add_edge(int u, int v){
        G[u].push_back(v);
        G[v].push_back(u);
    }
    void dfs(int v, int p, int d){
        parent[0][v] = p;
        depth[v] = d;
        for(int i = 0; i < G[v].size(); i++){
            if(G[v][i] != p) dfs(G[v][i], v, d + 1);
        }
    }
    void build(){
        dfs(root, -1, 0);
        for(int k = 0; k + 1 < MAX_LOG_V; k++){
            for(int v = 0; v < V; v++){
                if(parent[k][v] < 0) parent[k + 1][v] = -1;
                else parent[k + 1][v] = parent[k][parent[k][v]];
            }
        }
    }
    int query(int u, int v){
        if(depth[u] > depth[v]) swap(u, v);
        for(int k = 0; k < MAX_LOG_V; k++){
            if((depth[v] - depth[u]) >> k & 1){
                v = parent[k][v];
            }
        }
        if(u == v) return u;
        for(int k = MAX_LOG_V - 1; k >= 0; k--){
            if(parent[k][u] != parent[k][v]){
                u = parent[k][u];
                v = parent[k][v];
            }
        }
        return parent[0][u];    
    }
};

struct BIT{
    int N;
    vector<int> dat;
    BIT() {}
    BIT(int n) {
        N = n;
        dat.resize(N + 1);
    }
    void add(int k, int x){
        k++;
        while(k <= N){
            dat[k] += x;
            k += k&-k;
        }
    }
    int sum(int k){
        int s = 0;
        while(k > 0){
            s += dat[k];
            k -= k&-k;
        }
        return s;
    }
    int query(int a, int b){
        return sum(b) - sum(a);
    }
};

class Euler_Tour{
public:
    vector<vector<int> > g;
    vector<int> euler_tour, begin, end, dist;
    Euler_Tour(int n) : /* g(n),*/ begin(n), end(n){};
    int k = 0, root = 0;
    void dfs(int curr, int par){
        begin[curr] = k;
        euler_tour.push_back(curr);
        k++;
        for(auto next : g[curr]){
            if(next == par) continue;
            dfs(next, curr);
            euler_tour.push_back(curr);
            k++;
        }
        end[curr] = k;
    }
};

struct edge{
   int v, w;
};

vector<edge> G[100010];
map<P, int> cst;
int sum[100010];
int depth[100010];

int dfs(int v, int p, int dep){
    depth[v] = dep;
    if(G[v].size() == 1) return 0;
    for(auto i : G[v]){
        if(i.v == p) continue;
        sum[v] += dfs(i.v, v, dep + 1) + i.w;
    }
    return sum[v];
}

signed main(){
    cin.tie(nullptr);
    ios::sync_with_stdio(false);
    int n;
    cin >> n;
    LowestCommonAncestor lca(n);
    Euler_Tour et(n);
    et.g.resize(n);
    rep(i, 0, n - 1){
        int u, v, w;
        cin >> u >> v >> w;
        G[u].push_back({v, w});
        G[v].push_back({u, w});
        lca.add_edge(u, v);
        et.g[u].push_back(v);
        et.g[v].push_back(u);
        cst[{u, v}] = w;
        cst[{v, u}] = w;
    }
    dfs(0, -1, 0);
    et.dfs(0, -1);
    BIT bt(2 * n);
    lca.build();
    rep(i, 0, 2 * n - 2){
        int u = et.euler_tour[i];
        int v = et.euler_tour[i + 1];
        if(depth[u] < depth[v]) bt.add(i, cst[{u, v}]);
        else bt.add(i, -cst[{u, v}]);
    }
    int q;
    cin >> q;
    while(q--){
        int x, y, z;
        cin >> x >> y >> z;
        int u1 = lca.query(x, y);
        int u2 = lca.query(y, z);
        int u3 = lca.query(z, x);
        int v = lca.query(u1, u2);
        int ans = 0;
        ans = bt.query(et.begin[v], et.begin[x]) + bt.query(et.begin[v], et.begin[y]) + bt.query(et.begin[v], et.begin[z]);
        // cout << x << ' ' << y << ' ' << z << ' ' << v << endl;
        // cout << u1 << ' ' << u2 << ' ' << u3 << endl;
        if(v != u1) ans -= bt.query(et.begin[v], et.begin[u1]);
        if(v != u2) ans -= bt.query(et.begin[v], et.begin[u2]);
        if(v != u3) ans -= bt.query(et.begin[v], et.begin[u3]);
        cout << ans << endl;
    }
}