#include <iostream>
#include <cstdio>
#include <iomanip>
#include <vector>
#include <map>
#include <set>
#include <queue>
#include <bitset>
#include <stack>
#include <utility>
#include <numeric>
#include <algorithm>
#include <functional>
#include <cctype>
#include <complex>
#include <string>
#include <sstream>
#include <cassert>
using namespace std;

//common
typedef int  i32;
typedef long long i64,ll;
#define BR "\n"

#define ALL(c) (c).begin(),(c).end()
#define REP(i,n) for(int i=0;i<(int)(n);++i)
#define EACH(it,o) for(auto it = (o).begin(); it != (o).end(); ++it)
#define IN(l,v,r) ((l)<=(v) && (v)<(r))

typedef vector<int> vi; typedef pair<int,int> pii; typedef vector<pair<int,int> > vpii;
typedef long long ll; typedef vector<long long> vl; typedef pair<long long,long long> pll; typedef vector<pair<long long,long long> > vpll;
typedef vector<string> vs; typedef long double ld;

//config
//#define MODE_DEBUG
//#define INF 1<<30
//#define EPS 1e-8
//const ll MOD =100000007;

//debug
#ifdef MODE_DEBUG
#define LINE()    cerr<< " (L" << __LINE__ << ")"
#define LINELN()    LINE()<<endl

#define  DUMP(x)  cerr << #x << " = " << (x) <<endl
#define DEBUG(x) DUMP(x) << " (L" << __LINE__ << ")" << " " << __FILE__<<endl
#define CHECK(exp,act)  if(exp!=act){DUMP(exp);DEBUG(act);}
#define STOP(e)  CHECK(e,true);if(!(e)) exit(1);
#else
#define DUMP(x)
#define DEBUG(x)
#define CHECK(exp,act)
#define STOP(e)
#endif

template<class T> inline string toString(const vector<T>& x) {
	stringstream ss;
	REP(i,x.size()){
		if(i!=0)ss<<" ";
		ss<< x[i];
	}
	return ss.str();
}
template<class T> inline string toString(const vector<vector<T>>& map) {
	stringstream ss;
	REP(i,map.size()){
		if(i!=0)ss<<BR;
		ss<< toString(map[i]);
	}
	return ss.str();
}
template<class K,class V>  string toString(map<K,V>& x) {
	string res;stringstream ss;
	for(auto& p:x)ss<< p.first<<":" << p.second<<" ";
	return ss.str();
}

template<typename T,typename V> inline T mod(T v,V MOD){
	return (v%MOD+MOD)%MOD;
}

typedef vector<vector<int>> Mat;
void warshall_floyd(Mat& d){
    const int V=d.size();
    for(int k=0;k<V;k++)
        for(int i=0;i<V;i++)for(int j=0;j<V;j++)
            if(d[i][j]>d[i][k] + d[k][j]){
                d[i][j]=d[i][k] + d[k][j];
                //prev[i][j]=k;
            }
}

const int INF =1<<28;
int main(){

	while(true){
		int N,M;cin >> N >> M;
		if(N==0 && M==0)return 0;
		Mat ds(M+1,vector<int>(M+1,INF));
		Mat cs(M+1,vector<int>(M+1,INF));
		REP(i,M+1)ds[i][i]=cs[i][i]=0;

		REP(i,N){
			int a,b,c,t; cin >> a >> b >> c>>t;
			ds[a][b]=min(ds[a][b],t);ds[b][a]=min(ds[b][a],t);

			cs[a][b]=min(cs[a][b],c);cs[b][a]=min(cs[b][a],c);
		}
		warshall_floyd(ds);DUMP(toString(ds));
		warshall_floyd(cs);DUMP(toString(cs));
		int k;cin >> k;
		REP(i,k){
			int p,q,r;cin >> p >> q >>r;
			if(r==0)cout<<cs[p][q]<<endl;
			else cout<<ds[p][q]<<endl; 
		}
	}
	return 0;
}