#include <bits/stdc++.h>
using namespace std;
const int LOG = 17;
const long long INF = 1000000000000000;
int main(){
  int N, K;
  cin >> N >> K;
  vector<vector<pair<int, int>>> E(N);
  for (int i = 0; i < N - 1; i++){
    int A, B, C;
    cin >> A >> B >> C;
    A--;
    B--;
    C *= 2;
    E[A].push_back(make_pair(C, B));
    E[B].push_back(make_pair(C, A));
  }
  vector<vector<pair<int, int>>> E2 = E;
  for (int i = 0; i < K; i++){
    E2.push_back(vector<pair<int, int>>(0));
  }
  for (int i = 0; i < K; i++){
    int M, P;
    cin >> M >> P;
    for (int j = 0; j < M; j++){
      int X;
      cin >> X;
      X--;
      E2[X].push_back(make_pair(P, N + i));
      E2[N + i].push_back(make_pair(P, X));
    }
  }
  vector<vector<long long>> d(K, vector<long long>(N + K, -1));
  for (int i = 0; i < K; i++){
    priority_queue<pair<long long, int>, vector<pair<long long, int>>, greater<pair<long long, int>>> pq;
    pq.push(make_pair(0, N + i));
    while (!pq.empty()){
      long long dd = pq.top().first;
      int v = pq.top().second;
      pq.pop();
      if (d[i][v] == -1){
        d[i][v] = dd;
        for (auto P : E2[v]){
          int w = P.second;
          if (d[i][w] == -1){
            pq.push(make_pair(dd + P.first, w));
          }
        }
      }
    }
  }
  vector<int> p(N, -1);
  vector<vector<int>> c(N);
  vector<long long> d1(N, 0);
  vector<int> d2(N, 0);
  queue<int> q;
  q.push(0);
  while (!q.empty()){
    int v = q.front();
   q.pop();
    for (auto P : E[v]){
      int w = P.second;
      if (w != p[v]){
        p[w] = v;
        c[v].push_back(w);
        d1[w] = d1[v] + P.first;
        d2[w] = d2[v] + 1;
        q.push(w);
      }
    }
  }
  vector<vector<int>> pp(LOG, vector<int>(N, -1));
  pp[0] = p;
  for (int i = 0; i < LOG - 1; i++){
    for (int j = 0; j < N; j++){
      if (pp[i][j] != -1){
        pp[i + 1][j] = pp[i][pp[i][j]];
      }
    }
  }
  int Q;
  cin >> Q;
  for (int i = 0; i < Q; i++){
    int U, V;
    cin >> U >> V;
    U--;
    V--;
    long long ans = INF;
    for (int j = 0; j < K; j++){
      for (int k = 0; k < K; k++){
        ans = min(ans, d[j][U] + d[k][V] + d[j][N + k]);
      }
    }
    int u = U, v = V;
    if (d2[U] > d2[V]){
      swap(U, V);
    }
    for (int j = 0; j < LOG; j++){
      if (((d2[V] - d2[U]) >> j & 1) == 1){
        V = pp[j][V];
      }
    }
    int w;
    if (U == V){
      w = U;
    } else {
      for (int i = LOG - 1; i >= 0; i--){
        if (pp[i][U] != pp[i][V]){
          U = pp[i][U];
          V = pp[i][V];
        }
      }
      w = p[U];
    }
    ans = min(ans, d1[u] + d1[v] - 2 * d1[w]);
    ans /= 2;
    cout << ans << endl;
  }
}