/* {{{ Shinobu kawaii */
/*
  ______   __        _                  __                 
.' ____ \ [  |      (_)                [  |                
| (___ \_| | |--.   __   _ .--.   .--.  | |.--.   __   _   
 _.____`.  | .-. | [  | [ `.-. |/ .'`\ \| '/'`\ \[  | | |  
| \____) | | | | |  | |  | | | || \__. ||  \__/ | | \_/ |, 
 \______.'[___]|__][___][___||__]'.__.'[__;.__.'  '.__.'_/ 

*/
/* }}} */

#include <bits/stdc++.h>
using namespace std;

// #define int long long
struct Fast {Fast(){std::cin.tie(0);ios::sync_with_stdio(false);}} fast;

/* cpp template {{{ */

/* short */
#define pb push_back
#define mp make_pair
#define Fi first
#define Se second
#define ALL(v) (v).begin(), (v).end()
#define X real()
#define Y imag()

/* REPmacro */
#define REPS(i, a, n) for (int i = (a); i < (n); ++i)
#define REP(i, n) REPS(i, 0, n)
#define RREP(i, n) REPS(i, 1, n + 1)
#define DEPS(i, a, n) for (int i = (a); i >= n; --i)
#define DEP(i, n) DEPS(i, n, 0)

/* debug */
#define debug(x) cerr << x << " " << "(L:" << __LINE__ << ")" << '\n';

/* alias */
using ll = long long;
using ull = unsigned long long;
using vi = vector<int>;
using vvi = vector<vi>;
using vvvi = vector<vvi>;
using pii = pair<int, int>;
using D = double;
using P = complex<D>;

/* const */
const int INF = 1001001001;
const ll LINF = 1001001001001001001ll;
const int MOD = 1e9 + 7;
const D EPS = 1e-9;
const int dx[] = {0, 1, 0, -1, 1, -1, 1, -1}, dy[] = {1, 0, -1, 0, 1, -1, -1, 1};

/* func */
inline bool inside(int y, int x, int H, int W) {return y >= 0 && x >= 0 && y < H && x < W;}
inline int in() {int x; std::cin >> x; return x;}
template <typename T> void print(T x) {std::cout << x << '\n';}
template <typename T>
void print(std::vector<T>& v, std::string s = " ") {
  REP(i, v.size()) {
    if (i != 0) std::cout << s;
    std::cout << v[i];
  }
  std::cout << '\n';
}

/* }}} */

int n, m;

void warshall_floyd(vvi& d)
{
  REP(k, m) REP(i, m) REP(j, m) {
    d[i][j] = min(d[i][j], d[i][k] + d[k][j]);
  }
}

signed main()
{
  while (cin >> n >> m, n || m) {
    vvi dc, dt;
    dc = dt = vvi(m, vi(m, INF));
    REP(i, n) {
      int a = in() - 1, b = in() - 1;
      dc[a][b] = dc[b][a] = in();
      dt[a][b] = dt[b][a] = in();
    }
    warshall_floyd(dc);
    warshall_floyd(dt);
    int k = in();
    REP(i, k) {
      int a = in() - 1, b = in() - 1, r = in();
      print(r ? dt[a][b] : dc[a][b]);
    }
  }

  return 0;
}
#include<iostream>
#include<algorithm>
#include<vector>
#include<stack>
#include<queue>
#include<cstdio>
#include<climits>
#include<cmath>
#include<cstring>
#include<string>

#define f first
#define s second
#define mp make_pair

#define REP(i,n) for(int i=0; i<(int)(n); i++)
#define FOR(i,c) for(__typeof((c).begin()) i=(c).begin(); i!=(c).end(); i++)
#define ALL(c) (c).begin(), (c).end()

using namespace std;

typedef unsigned int uint;
typedef long long ll;

int main(){
  int n,m;
  while(scanf("%d%d",&n,&m), n+m){
    int time[100][100] = {{0}};
    int cost[100][100] = {{0}};
    REP(i,n){
      int a,b,c,d;
      scanf("%d%d%d%d",&a,&b,&c,&d);
      a--; b--;
      cost[a][b] = cost[b][a] = c;
      time[a][b] = time[b][a] = d;
    }
    int k;
    scanf("%d",&k);
    while(k --> 0){
      int p,q,type;
      int (*load)[100];
      scanf("%d%d%d",&p,&q,&type);
      if(type == 0) load = cost;
      else load = time;

      p--; q--;
      int memo[100];
      memset(memo, -1, sizeof(memo));
      priority_queue<pair<int,int>,vector<pair<int,int> >,greater<pair<int,int> > > qq;
      qq.push(mp(0, p));
      while(qq.size()){
	int c = qq.top().f;
	int pos = qq.top().s;
	qq.pop();
	if(pos == q){
	  printf("%d\n",c);
	  break;
	}
	if(memo[pos] != -1)
	  continue;
	memo[pos] = c;
	REP(i,m){
	  if(memo[i] == -1 && load[pos][i] != 0)
	    qq.push(mp(c+load[pos][i], i));
	}
      }
    }
  }
  return 0;
}