#include "bits/stdc++.h"
#define REP(i, n) for(int i = 0; i < int(n); i++)
#define FOR(i,n,m) for(int i = int(n); i < int(m); i++)
using namespace std;
typedef long long ll;

struct Edge {
    int to, cost;
};

// 最近共通祖先(Doubling)
// verrify : https://onlinejudge.u-aizu.ac.jp/problems/GRL_5_C
// <O(NlogN),O(lonN)>
struct LowestCommonAncestor {
private:
    int n;
    int log;
    vector<vector<int>> parent;
    vector<int> dep;
    vector<int> dis; // root からの距離
    void dfs(const vector<vector<Edge>> &G, int v, int p, int d, int di) {
        parent[0][v] = p;
        dep[v] = d;
        dis[v] = di;
        for (Edge e : G[v]) {
            if (e.to != p) dfs(G, e.to, v, d + 1,di + e.cost);
        }
    }
public:
    LowestCommonAncestor(const vector<vector<Edge>> &G, int root = 0) {
        build(G, root);
    }

    void build(const vector<vector<Edge>> &G, int root = 0) {
        n = G.size();
        log = log2(n) + 1;
        parent.resize(log, vector<int>(n));
        dep.resize(n);
        dis.resize(n);
        dfs(G, root, -1, 0, 0);
        for (int k = 0; k + 1 < log; k++) {
            for (int v = 0; v < G.size(); v++) {
                if (parent[k][v] < 0) {
                    parent[k + 1][v] = -1;
                }
                else {
                    parent[k + 1][v] = parent[k][parent[k][v]];
                }
            }
        }
    }

    int depth(int v) {
        return dep[v];
    }

    // O(logN)
    int lca(int u, int v) {
        if (dep[u] > dep[v]) swap(u, v);
        REP(k, log) if ((dep[v] - dep[u]) >> k & 1) v = parent[k][v];
        if (u == v) return u;
        for (int k = log - 1; k >= 0; k--) {
            if (parent[k][u] != parent[k][v]) {
                u = parent[k][u];
                v = parent[k][v];
            }
        }
        return parent[0][u];
    }

    int dist(int u, int v) {
        return dis[u] + dis[v] - 2 * dis[lca(u, v)];
    }
};

int main() {
    int n; cin >> n; 
    vector<vector<Edge>> G(n);
    REP(i, n-1) {
        int a, b, c; scanf("%d %d %d", &a, &b, &c);
        G[a].push_back({b,c});
        G[b].push_back({a,c});
    }
    LowestCommonAncestor lca(G);
    int q; cin >> q;
    REP(i, q) {
        int a, b, c; scanf("%d %d %d", &a, &b, &c);
        ll sum = 0;
        sum += lca.dist(a, b);
        sum += lca.dist(b, c);
        sum += lca.dist(c, a);
        cout << sum / 2 << endl;
    }
    return 0;
}