#include <bits/stdc++.h>
using namespace std;
typedef long long   signed int LL;
typedef long long unsigned int LU;
#define incID(i, l, r) for(LL i = (l)    ; i <  (r); ++i)
#define incII(i, l, r) for(LL i = (l)    ; i <= (r); ++i)
#define decID(i, l, r) for(LL i = (r) - 1; i >= (l); --i)
#define decII(i, l, r) for(LL i = (r)    ; i >= (l); --i)
#define inc(i, n)  incID(i, 0, n)
#define inc1(i, n) incII(i, 1, n)
#define dec(i, n)  decID(i, 0, n)
#define dec1(i, n) decII(i, 1, n)
#define inID(v, l, r) ((l) <= (v) && (v) <  (r))
#define inII(v, l, r) ((l) <= (v) && (v) <= (r))
#define PB push_back
#define EB emplace_back
#define MP make_pair
#define FI first
#define SE second
#define  ALL(v)  v.begin(),  v.end()
#define RALL(v) v.rbegin(), v.rend()
template<typename T> bool setmin  (T & a, T b) { if(b <  a) { a = b; return true; } else { return false; } }
template<typename T> bool setmax  (T & a, T b) { if(b >  a) { a = b; return true; } else { return false; } }
template<typename T> bool setmineq(T & a, T b) { if(b <= a) { a = b; return true; } else { return false; } }
template<typename T> bool setmaxeq(T & a, T b) { if(b >= a) { a = b; return true; } else { return false; } }
LL mo(LL a, LL b) { assert(b > 0); a %= b; if(a < 0) { a += b; } return a; }
LL fl(LL a, LL b) { assert(b > 0); return (a > 0 ? a / b : (a - b + 1) / b); }
LL ce(LL a, LL b) { assert(b > 0); return (a < 0 ? a / b : (a + b - 1) / b); }
template<typename T> T gcd(T a, T b) { return (b == 0 ? a : gcd(b, a % b)); }
template<typename T> T lcm(T a, T b) { return a / gcd(a, b) * b; }
#define bit(b, i) (((b) >> (i)) & 1)
#define BC __builtin_popcountll
#define SC static_cast
#define SI(v) SC<int>(v.size())
#define SL(v) SC<LL >(v.size())
#define RF(e, v) for(auto & e: v)
#define ef else if
#define UR assert(false)

// ---- ----

const int N = 100000;
const int B = 17;

int n, q;
vector<pair<int, LL>> g[N];

LL s[N];

int h[N], p[B][N];
void dfs(int v, int pp, int hh, LL ss) {
	s[v] = ss;
	h[v] = hh;
	p[0][v] = pp;
	for(auto && e: g[v]) {
		if(e.FI == pp) { continue; }
		dfs(e.FI, v, h[v] + 1, s[v] + e.SE);
	}
}
void pre() {
	dfs(0, -1, 0, 0);
	inc(k, B - 1) {
	inc(i, n) {
		p[k + 1][i] = p[k][p[k][i]];
	}
	}
}
int lca(int a, int b) {
	if(! (h[a] <= h[b])) { swap(a, b); }
	int d = h[b] - h[a];
	inc(k, B) { if(bit(d, k)) { b = p[k][b]; } }
	if(a == b) { return a; }
	
	dec(k, B) {
		int pa = p[k][a];
		int pb = p[k][b];
		if(pa != pb) { a = pa; b = pb; }
	}
	assert(p[0][a] == p[0][b]);
	
	return p[0][a];
}

int main() {
	cin >> n;
	inc(i, n - 1) {
		LL a, b, c;
		cin >> a >> b >> c;
		g[a].EB(b, c);
		g[b].EB(a, c);
	}
	
	pre();
	
	cin >> q;
	inc(qq, q) {
		int x, y, z;
		cin >> x >> y >> z;
		int X = lca(y, z);
		int Y = lca(z, x);
		int Z = lca(x, y);
		cout << s[x] + s[y] + s[z] - s[X] - s[Y] - s[Z] << "\n";
	}
	
	return 0;
}