#include <bits/stdc++.h>
using namespace std;
#define ld long double
#define pb push_back
#define fi first
#define se second
#define debug(x) cout << #x << " => " << x << "\n"
const int mod = 998244353;
const ld E = 1e-4;
int n, m, k, q, ki[100005], a[100005], b[100005], ans[100005];
vector <pair<int,int>> g[100005];
int md[100005];
pair <int,int> c[100005];
void dijkstra() {
for(int i = 1; i <= n; i++)
md[i] = 1e9;
priority_queue <pair<int,int>> pq;
for(int i = 1; i <= k; i++) {
pq.push({0, ki[i]});
md[ki[i]] = 0;
}
while(!pq.empty()) {
int cost = -pq.top().fi;
int pos = pq.top().se;
pq.pop();
if(cost > md[pos]) continue;
for(auto i : g[pos]) {
if(md[i.fi] > cost + i.se) {
md[i.fi] = cost + i.se;
pq.push({-md[i.fi], i.fi});
}
}
}
}
int par[100005];
vector <pair<int,int>> sack[100005];
bool unlock[100005];
int find(int u) {
if(u == par[u]) return u;
return par[u] = find(par[u]);
}
int merge(int u, int v, int w) {
u = find(u);
v = find(v);
if(u == v) return 0;
if(sack[u].size() < sack[v].size()) {
par[u] = v;
for(auto i : sack[u]) {
if(find(i.fi) == v)
ans[i.se] = max(ans[i.se], w);
else sack[v].pb(i);
}
}
else {
par[v] = u;
for(auto i : sack[v]) {
if(find(i.fi) == u)
ans[i.se] = max(ans[i.se], w);
else sack[u].pb(i);
}
}
return 1;
}
void solve () {
cin >> n >> m;
for(int i = 1, u, v, w; i <= m; i++) {
cin >> u >> v >> w;
g[u].pb({v, w});
g[v].pb({u, w});
}
cin >> k;
for(int i = 1; i <= k; i++) {
cin >> ki[i];
}
dijkstra();
// for(int i = 1; i <= n; i++)
// cout << md[i] << " ";
// cout << "\n";
cin >> q;
for(int i = 1; i <= q; i++) {
cin >> a[i] >> b[i];
sack[a[i]].pb({b[i], i});
sack[b[i]].pb({a[i], i});
}
for(int i = 1; i <= n; i++)
par[i] = i;
for(int i = 1; i <= n; i++)
c[i] = {md[i], i};
sort(c + 1, c + n + 1, greater<pair<int,int>>());
for(int i = 1; i <= q; i++)
ans[i] = -1;
for(int i = 1; i <= n; i++) {
int u = c[i].se;
unlock[u] = true;
for(auto v : g[u]) {
if(unlock[v.fi]) {
merge(u, v.fi, c[i].fi);
}
}
}
for(int i = 1; i <= q; i++)
cout << ans[i] << "\n";
}
signed main () {
ios_base::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
solve ();
}
