#include <bits/stdc++.h>

using namespace std;

using ll = long long;
using P = pair<int, ll>;

const int MAX_V = 100000;
const int MAX_LOG_V = 17;

vector<P> G[MAX_V];
int root = 0;

int parent[MAX_LOG_V][MAX_V];
int depth[MAX_V];
ll weights[MAX_V];

void dfs(int v, int p, int d, ll w) {
    parent[0][v] = p;
    depth[v] = d;
    weights[v] = w;
    for (int i = 0; i < G[v].size(); i++) {
        if (G[v][i].first != p) dfs(G[v][i].first, v, d + 1, w + G[v][i].second);
    }
}

void init(int V) {
    dfs(root, -1, 0, 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 lca(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];
}

int main() {
    cin.tie(0);
    ios::sync_with_stdio(false);
    int n;
    cin >> n;
    for (int i = 1; i < n; i++) {
        int u, v;
        ll w;
        cin >> u >> v >> w;
        G[u].emplace_back(v, w);
        G[v].emplace_back(u, w);
    }

    init(n);

    int q;
    cin >> q;
    for (int i = 0; i < q; i++) {
        int x, y, z;
        cin >> x >> y >> z;
        int xy = lca(x, y);
        int yz = lca(y, z);
        int zx = lca(z, x);

        int tar = xy;
        int hoge = lca(xy, z);
        ll ans = weights[x] + weights[y] - weights[xy] * 2;
        ans += weights[z] + weights[xy] - weights[hoge] * 2;
        if (depth[tar] < depth[yz]) {
            tar = yz;
            ans = weights[y] + weights[z] - weights[yz] * 2;
            ans += weights[x] + weights[yz] - weights[hoge] * 2;
        }
        if (depth[tar] < depth[zx]) {
            tar = zx;
            ans = weights[z] + weights[x] - weights[zx] * 2;
            ans += weights[y] + weights[zx] - weights[hoge] * 2;
        }
        
        cout << ans << "\n";
    }
    return 0;
}