import sys
input = sys.stdin.readline

N = int(input())
X = [[] for i in range(N)]
for i in range(N-1):
    x, y, w = map(int, input().split())
    X[x].append((y, w))
    X[y].append((x, w))

P = [-1] * N
Q = [0]
DE = [0] * N
DI = [0] * N
while Q:
    i = Q.pop()
    for a, w in X[i][::-1]:
        if a != P[i]:
            P[a] = i
            X[a].remove((i, w))
            Q.append(a)
            DE[a] = DE[i] + 1
            DI[a] = DI[i] + w

D = [[P[i] for i in range(N)]] + [[-1]*N for _ in range(16)]
for k in range(1, 17):
    for i in range(N):
        a = D[k-1][i]
        if a > 0:
            D[k][i] = D[k-1][a]

def lca(u, v):
    if DE[u] < DE[v]:
        u, v = v, u
    
    while DE[u] > DE[v]:
        d = DE[u] - DE[v]
        dd = d.bit_length() - 1
        u = D[dd][u]
    if u == v:
        return u
    
    for i in range(17)[::-1]:
        if D[i][u] != D[i][v]:
            u = D[i][u]
            v = D[i][v]
    
    return D[0][u]

for _ in range(int(input())):
    x, y, z = map(int, input().split())
    xx, yy, zz = lca(y, z), lca(z, x), lca(x, y)
    print((DI[x]+DI[y]+DI[z])-(DI[xx]+DI[yy]+DI[zz]))