#include <iostream>

 #include <cstring>

 #include <algorithm>

 #include <cstdio>

 #include <string>

 using namespace std;

 typedef long long LL;

 #define inf 1e9

 #define rep(i,j,k) for(int i = (j); i <= (k); i++)

 #define rep__(i,j,k) for(int i = (j); i < (k); i++)

 #define per(i,j,k) for(int i = (j); i >= (k); i--)

 #define per__(i,j,k) for(int i = (j); i > (k); i--)

 const int N = ;

 bool vis[N];

 int mp[N][N];

 bool fired[N];

 int team[N];

 int dis[N];

 int V,E,S,K,C;

 int dijkstra(int s){

     rep(i,,V) vis[i] = false;

     if(s){

         rep(i,,V) dis[i] = inf;

         rep(i,,V) dis[i] = mp[s][i];

         vis[s] = true;

         rep(i,,V){//团队的

             int x = -;

             int c = inf;

             rep(j,,V){

                 if(!vis[j] && c > dis[j]) x = j, c = dis[j];

             }

             if(x == -) continue;

             vis[x] = true;

             rep(p,,V){

                 if(!vis[p] && dis[x] + mp[x][p] < dis[p]){

                     dis[p] = dis[x] + mp[x][p];

                 }

             }

         }

     }

     else{//英雄的

         rep(i,,V) dis[i] = inf;

         rep(i,,K) dis[team[i]] = ;

         vis[s] = true;

         rep(i,,V){

             int x = -;

             int c = inf;

             rep(j,,V){

                 if(!vis[j] && c > dis[j]) x = j, c = dis[j];

             }

             if(x == -) continue;

             vis[x] = true;

             rep(p,,V){

                 if(!vis[p] && dis[x] + mp[x][p] < dis[p]){

                     dis[p] = dis[x] + mp[x][p];

                 }

             }

         }

     }

     int ans = ;

     rep(i,,V){

         if(dis[i] == inf) continue;

         if(fired[i]) ans = max(ans,dis[i]);

     }

     return ans;

 }

 int main(){

     ios::sync_with_stdio(false);

     cin.tie();

     int T;

     cin >> T;

     int p = ;

     int q = ;

     while(T--){

         cin >> V >> E >> S >> K >> C;

         rep(i,,V) rep(j,,V){

             if(i == j) mp[i][j] = ;

             else mp[i][j] = inf;

         }

         rep(i,,K){

             cin >> team[i];

         }

         int u,v,w;

         rep(i,,E){

             cin >> u >> v >> w;

             fired[v] = true;

             if(mp[u][v] > w){

                 mp[u][v] = mp[v][u] = w;

             }

         }

         p = dijkstra(S);//英雄

         q = dijkstra();//团队

         if(p <= q*C) cout << p << endl;

         else cout << q << endl;

     }

     getchar();getchar();

     return ;

 }