#pragma optimize("Bismillahirrahmanirrahim")
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//Allahuekber
//ahmet23 orz...
//Sani buyuk Osman Pasa Plevneden cikmam diyor.
//FatihSultanMehmedHan
//YavuzSultanSelimHan
//AbdulhamidHan
#define author tolbi
#include <bits/stdc++.h>
using namespace std;
template<typename X, typename Y> istream& operator>>(istream& in, pair<X,Y> &pr) {return in>>pr.first>>pr.second;}
template<typename X, typename Y> ostream& operator<<(ostream& os, pair<X,Y> pr) {return os<<pr.first<<" "<<pr.second;}
template<typename X, typename Y> pair<X,Y> operator+(pair<X,Y> a, pair<X,Y> b) {pair<X,Y> c; c.first=a.first+b.first,c.second=a.second+b.second;return c;}
template<typename X, typename Y> pair<X,Y> operator-(pair<X,Y> a, pair<X,Y> b) {pair<X,Y> c; c.first=a.first-b.first,c.second=a.second-b.second;return c;}
template<typename X, typename Y> void operator+=(pair<X,Y> &a, pair<X,Y> b){a.first+=b.first,a.second+=b.second;}
template<typename X, typename Y> void operator-=(pair<X,Y> &a, pair<X,Y> b){a.first-=b.first,a.second-=b.second;}
template<typename X> istream& operator>>(istream& in, vector<X> &arr) {for(auto &it : arr) in>>it; return in;}
template<typename X> ostream& operator<<(ostream& os, vector<X> arr) {for(auto &it : arr) os<<it<<" "; return os;}
template<typename X, size_t Y> istream& operator>>(istream& in, array<X,Y> &arr) {for(auto &it : arr) in>>it; return in;}
template<typename X, size_t Y> ostream& operator<<(ostream& os, array<X,Y> arr) {for(auto &it : arr) os<<it<<" "; return os;}
#define int long long
#define endl '\n'
#define vint(x) vector<int> x
#define deci(x) int x;cin>>x;
#define decstr(x) string x;cin>>x;
#define cinarr(x) for (auto &it : x) cin>>it;
#define coutarr(x) for (auto &it : x) cout<<it<<" ";cout<<endl;
#define sortarr(x) sort(x.begin(),x.end())
#define sortrarr(x) sort(x.rbegin(),x.rend())
#define det(x) cout<<"NO\0YES"+x*3<<endl;
#define INF LONG_LONG_MAX
#define rev(x) reverse(x.begin(),x.end());
#define ios ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define tol(bi) (1LL<<((int)(bi)))
const int MOD = 1e9+7;
mt19937 ayahya(chrono::high_resolution_clock().now().time_since_epoch().count());
vector<vector<pair<int,int>>> arr;
#include "swap.h"
void init(int32_t N, int32_t M, vector<int32_t> U, vector<int32_t> V, vector<int32_t> W) {
arr.resize(N);
for (int i = 0; i < M; i++){
arr[U[i]].push_back({V[i],W[i]});
arr[V[i]].push_back({U[i],W[i]});
}
}
int32_t getMinimumFuelCapacity(int32_t X, int32_t Y){
vector<bool> vis(arr.size(),false);
bool don = false;
priority_queue<pair<int,pair<int,int>>,vector<pair<int,pair<int,int>>>,greater<pair<int,pair<int,int>>>> pq;
pq.push({0,{X,-1}});
map<pair<int,int>,bool> kul;
vector<int> dal(arr.size());
int ans = 0;
bool boolean=false;
while (pq.size()){
int tim = pq.top().first;
int gel = pq.top().second.second;
int node = pq.top().second.first;
pq.pop();
ans=max(ans,tim);
if (gel!=-1) kul[{gel,node}]=true;
if (vis[node]){
don=true;
if (vis[Y] && don) {
boolean=true;
break;
}
continue;
}
vis[node]=true;
if (gel!=-1) dal[gel]++;
if (gel!=-1 && gel!=X && gel!=Y && dal[gel]>=2){
don=true;
}
if (vis[Y] && don){
boolean=true;
break;
}
for (int i = 0; i < arr[node].size(); i++){
if (kul.count({arr[node][i].first,node})) continue;
pq.push({arr[node][i].second,{arr[node][i].first,node}});
}
}
if (!boolean) ans = -1;
return ans;
}
#ifdef tolbi
int32_t main() {
int32_t N, M;
assert(2 == scanf("%d %d", &N, &M));
vector<int32_t> U(M), V(M), W(M);
for (int32_t i = 0; i < M; ++i) {
assert(3 == scanf("%d %d %d", &U[i], &V[i], &W[i]));
}
int32_t Q;
assert(1 == scanf("%d", &Q));
vector<int32_t> X(Q), Y(Q);
for (int32_t i = 0; i < Q; ++i) {
assert(2 == scanf("%d %d", &X[i], &Y[i]));
}
init(N, M, U, V, W);
vector<int32_t> minimum_fuel_capacities(Q);
for (int32_t i = 0; i < Q; ++i) {
minimum_fuel_capacities[i] = getMinimumFuelCapacity(X[i], Y[i]);
cout<<minimum_fuel_capacities[i]<<endl;
}
return 0;
}
#endif
