#include <bits/stdc++.h>

int ri() {
	int n;
	scanf("%d", &n);
	return n;
}

std::vector<std::vector<std::pair<int, int> > > hen;
std::vector<int> depth;
std::vector<int64_t> dist;
std::vector<std::vector<int> > par;

void dfs(int i) {
	if (i) {
		int cur = par[i][0];
		for (int bit = 0; bit < par[cur].size(); bit++)
			par[i].push_back(cur = par[cur][bit]);
	}
	for (auto j : hen[i]) {
		par[j.first].push_back(i);
		dist[j.first] = dist[i] + j.second;
		depth[j.first] = depth[i] + 1;
		dfs(j.first);
	}
}
int lca(int i, int j) {
	if (i == j) return i;
	if (depth[i] > depth[j]) std::swap(i, j);
	for (int k = 20; k >= 0; k--) if (depth[j] - (1 << k) >= depth[i]) j = par[j][k];
	if (i == j) return i;
	for (int k = 20; k >= 0; k--) if (k < par[i].size() && par[i][k] != par[j][k]) {
		i = par[i][k];
		j = par[j][k];
	}
	return par[i][0];
}

int main() {
	int n = ri();
	hen.resize(n);
	for (int i = 0; i + 1 < n; i++) {
		int a = ri(), b = ri(), c = ri();
		hen[a].push_back({b, c});
	}
	par.resize(n);
	depth.resize(n);
	dist.resize(n);
	dfs(0);
	int q = ri();
	for (int i = 0; i < q; i++) {
		int x = ri();
		int y = ri();
		int z = ri();
		int l1 = lca(x, y);
		int l2 = lca(y, z);
		int l3 = lca(x, z);
		int64_t res = dist[x] + dist[y] + dist[z] - (dist[l1] + dist[l2] + dist[l3]);
		std::cout << res << std::endl;
	}
	
	return 0;
}