#include<bits/stdc++.h>
using namespace std;
const int N=2e5+10; 
vector<int> g[N];
int main()
{
	int n,q;
	cin>>n>>q;
	for(int i=1;i<=n;i++)
	{
		int t;
		cin>>t;
		g[i].push_back(t);
		while(t--)
		{
			int x;
			cin>>x;
			g[i].push_back(x); 
		}
	}
	while(q--)
	{
		int a,b;
		cin>>a>>b;
		cout<<g[a][b]<<endl;
	}
	return 0;
}