#include<bits/stdc++.h>
using namespace std;
using LL = long long;
using ULL = unsigned long long;
#define rep(i,n) for(int i=0; i<(n); i++)

const int xN = 100000;

struct Edge { int to; LL dist; };

int N;
vector<Edge> E[xN];
int P[xN];
LL D[xN];
int lcaP[20][xN];
int lcaD[xN];

void dfs(int p = 0) {
    for (Edge& e : E[p]) {
        if (P[p] == e.to) continue;
        D[e.to] = D[p] + e.dist;
        lcaD[e.to] = lcaD[p] + 1;
        P[e.to] = p;
        dfs(e.to);
    }
}

void init() {
    rep(i, N) P[i] = -1;
    rep(i, N) D[i] = 0;
    dfs(0);

    rep(i, N) lcaP[0][i] = P[i];
    lcaP[0][0] = 0;
    rep(d, 19) rep(i, N) lcaP[d + 1][i] = lcaP[d][lcaP[d][i]];
}

int LCA(int u, int v) {
    if (lcaD[u] > lcaD[v]) swap(u, v);
    for (int i = 19; i >= 0; i--) if (lcaD[u] + (1 << i) <= lcaD[v]) v = lcaP[i][v];
    if (u == v) return u;
    for (int i = 19; i >= 0; i--) if (lcaP[i][u] != lcaP[i][v]) {
        u = lcaP[i][u];
        v = lcaP[i][v];
    }
    return lcaP[0][u];
}

LL distance(int u, int v) {
    int g = LCA(u, v);
    return D[u] + D[v] - 2 * D[g];
}

int main() {
    cin >> N;
    rep(i, N - 1) {
        int u, v, c; cin >> u >> v >> c;
        E[u].push_back({ v,c });
        E[v].push_back({ u,c });
    }
    init();

    int Q; cin >> Q;
    while (Q--) {
        int x, y, z; cin >> x >> y >> z;
        LL ans = distance(x, y) + distance(y, z) + distance(z, x);
        ans /= 2;
        cout << ans << endl;
    }

    return 0;
}