// 2014/06/16 Tazoe

#include <iostream>
using namespace std;

const int INF = 1000000000;

int main()
{
	while(true){
		int n, m;
		cin >> n >> m;

		if(n==0 && m==0)
			break;

		int C[100][100];
		int T[100][100];
		for(int i=0; i<m; i++){
			for(int j=0; j<m; j++){
				if(i==j){
					C[i][j] = T[i][j] = 0;
				}
				else{
					C[i][j] = T[i][j] = INF;
				}
			}
		}

		for(int i=0; i<n; i++){
			int a, b, c, t;
			cin >> a >> b >> c >> t;

			C[a-1][b-1] = C[b-1][a-1] = c;
			T[a-1][b-1] = T[b-1][a-1] = t;
		}

	for(int k = 0; k < m; k++){
		for(int i = 0; i < m; i++){
			for(int j = 0; j < m; j++){
				if(C[i][j] > C[i][k] + C[k][j]){
					C[i][j] = C[i][k] + C[k][j];
				}
				if(T[i][j] > T[i][k] + T[k][j]){
					T[i][j] = T[i][k] + T[k][j];
				}
			}
		}
	}
	
	int k = 0; 
	cin >> k;
	for(int i = 0; i < k; i++){
		int start, goal, r;
		cin >> start >> goal >> r;
		if(r == 0){
			cout << C[start - 1][goal - 1] << endl;
		}else{
			cout << T[start - 1][goal - 1] << endl;
		}
	}
	}

	return 0;
}