#include <bits/stdc++.h>
using namespace std::literals::string_literals;
using i64 = long long;
using std::cout;
using std::endl;
using std::cin;

template<typename T>
std::vector<T> make_v(size_t a){return std::vector<T>(a);}

template<typename T,typename... Ts>
auto make_v(size_t a,Ts... ts){
  return std::vector<decltype(make_v<T>(ts...))>(a,make_v<T>(ts...));
}

struct LowestCommonAncestor{
	std::vector<std::vector<int>> g, parent;
	std::vector<int> depth;
	bool built = false;
	int N;

	const int logN = 20;
	
	LowestCommonAncestor(int n) : N(n) {
		g.resize(N);
		parent.resize(logN, std::vector<int>(N));
		depth.resize(N);
	}
	
	void add_edge(int u, int v){
		g[u].push_back(v);
		g[v].push_back(u);
	}
	
	void dfs(int v, int par = -1, int d = 0){
		parent[0][v] = par;
		depth[v] = d;
		
		for(auto e:g[v]){
			if(e == par) continue;
			dfs(e, v, d + 1);
		}
	}
	
	void build(){
		dfs(0);
		for(int k = 0; k < logN - 1; k++){
			for(int i = 0; i < N; i++){
				if(parent[k][i] < 0) parent[k + 1][i] = -1;
				else parent[k + 1][i] = parent[k][parent[k][i]];
			}
		}
	}
	
	int get(int u, int v){
		if(!built) build(); built = true;
		if(depth[u] > depth[v]) std::swap(u, v);
		
		for(int k = 0; k < logN; k++){
			if(((depth[v] - depth[u]) >> k) & 1){
				v = parent[k][v];
			}
		}
		if(u == v) return u;
		
		for(int k = logN - 1; k >= 0; k--){
			if(parent[k][u] == parent[k][v]) continue;
			u = parent[k][u];
			v = parent[k][v];			
		}
		
		return parent[0][u];
	}
};

int main() {
	// input
	int n; scanf("%d", &n);
	assert(1 <= n and n <= (int)1e5);

	LowestCommonAncestor lca(n);
	std::vector<std::vector<std::pair<int, i64>>> g(n);
	for(int i = 0; i < n - 1; i++) {
		int a, b, c; scanf("%d%d%d", &a, &b, &c);
		assert(0 <= a and a < n);
		assert(0 <= b and b < n);
		assert(1 <= c and c <= (int)1e9);
		
		g[a].push_back({b, c});
		g[b].push_back({a, c});
		lca.add_edge(a, b);
	}
	lca.build();
	
	// solve
	std::vector<i64> dist(n);
	auto dfs = [&](auto && dfs, int v, int par) -> void {
		for(auto e: g[v]) {
			if(e.first == par) continue;
			dist[e.first] = dist[v] + e.second;
			dfs(dfs, e.first, v);
		}
	};
	dfs(dfs, 0, -1);
	
	auto calc = [&lca, dist](const int & x, const int & y) -> i64 {
		return dist[x] + dist[y] - 2LL * dist[lca.get(x, y)];
	};

	int q; scanf("%d", &q);
	while(q--) {
		int x, y, z; scanf("%d%d%d", &x, &y, &z);
		assert(0 <= x and x < n);
		assert(0 <= y and y < n);
		assert(0 <= z and z < n);
		
		printf("%lld\n", (calc(x, y) + calc(y, z) + calc(z, x)) >> 1);
	}
	return 0;
}