#include <bits/stdc++.h>

using namespace std;
void fast_io() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
}

int main() {
    fast_io();
    int n;
    cin >> n;
    vector<vector<pair<int, int>>> g(n);
    for (int i = 0; i < n - 1; i++) {
        int u, v, w;
        cin >> u >> v >> w;
        g[u].push_back({v, w});
        g[v].push_back({u, w});
    }
    vector<int> pre(n, -1);
    vector<long long> dist(n, -1);
    vector<int> dep(n, -1);
    deque<int> dq{0};
    pre[0] = dist[0] = dep[0] = 0;
    while (!dq.empty()) {
        int u = dq.front();
        dq.pop_front();
        for (auto [v, w] : g[u]) {
            if (pre[v] == -1) {
                pre[v] = u;
                dist[v] = dist[u] + w;
                dep[v] = dep[u] + 1;
                dq.push_back(v);
            }
        }
    }
    vector<vector<int>> dbl_pre(20, vector<int>(n));
    dbl_pre[0] = pre;
    for (int i = 0; i < 19; i++) {
        for (int j = 0; j < n; j++) {
            dbl_pre[i + 1][j] = dbl_pre[i][dbl_pre[i][j]];
        }
    }
    auto lca = [&](int u, int v) {
        if (dep[u] < dep[v]) swap(u, v);
        int diff = dep[u] - dep[v];
        for (int i = 0; i < 20; i++) {
            if (diff & (1 << i)) {
                u = dbl_pre[i][u];
            }
        }
        if (u == v) return u;
        for (int i = 19; i >= 0; i--) {
            if (dbl_pre[i][u] != dbl_pre[i][v]) {
                u = dbl_pre[i][u];
                v = dbl_pre[i][v];
            }
        }
        return pre[u];
    };
    auto calc_dist = [&](int u, int v) {
        return dist[u] + dist[v] - 2 * dist[lca(u, v)];
    };
    int q;
    cin >> q;
    for (; q--;) {
        int x, y, z;
        cin >> x >> y >> z;
        // cout << x << " " << y << " " << z << " " << lca(x, y) << " "
        //      << lca(y, z) << " " << lca(z, x) << "\n";
        long long ans = calc_dist(x, y) + calc_dist(y, z) + calc_dist(z, x);
        ans /= 2;
        cout << ans << "\n";
    }
}