use proconio::input;
use std::cmp::Reverse;

fn main() {
    input! {
        n: usize,
        edges: [(usize, usize, u64); n - 1],
        q: usize,
        queries: [(usize, usize, usize); q],
    }
    let mut g = vec![Vec::new(); n];
    for &(i, j, _) in &edges {
        g[i].push(j);
        g[j].push(i);
    }
    let mut stack = vec![0];
    let mut parent = vec![usize::MAX; n];
    parent[0] = 0;
    let mut size = vec![1; n];
    while let Some(x) = stack.pop() {
        match x >> (usize::BITS - 1) & 1 {
            0 => {
                stack.push(!x);
                g[x].retain(|&y| y != parent[x]);
                for &y in &g[x] {
                    if parent[y] != usize::MAX {
                        continue;
                    }
                    parent[y] = x;
                    stack.push(y);
                }
            }
            1 => {
                let x = !x;
                g[x].sort_unstable_by_key(|&y| Reverse(size[y]));
                for &y in &g[x] {
                    size[x] += size[y];
                }
            }
            _ => unreachable!(),
        }
    }
    let mut sorted = Vec::new();
    let mut position = vec![usize::MAX; n];
    let mut head = (0..n).collect::<Vec<_>>();
    let mut stack = vec![0];
    while let Some(x) = stack.pop() {
        position[x] = sorted.len();
        sorted.push(x);
        if let Some(&y) = g[x].first() {
            head[y] = head[x];
        }
        stack.extend(g[x].iter().rev().copied());
    }
    let mut values = vec![0; n];
    for &(i, j, w) in &edges {
        let i = if parent[i] == j { i } else { j };
        values[position[i]] = w;
    }
    for i in (0..n - 1).rev() {
        values[i] += values[i + 1];
    }
    values.push(0);
    for &(i, j, k) in &queries {
        let mut ans = 0;
        for &(mut i, mut j) in &[(i, j), (j, k), (k, i)] {
            loop {
                if position[i] > position[j] {
                    std::mem::swap(&mut i, &mut j);
                }
                if head[i] == head[j] {
                    ans += values[position[i] + 1] - values[position[j] + 1];
                    break;
                }
                ans += values[position[head[j]]] - values[position[j] + 1];
                j = parent[head[j]];
            }
        }
        ans /= 2;
        println!("{}", ans);
    }
}