#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;


int main() {
    /*
    defining the variables
    n : size of main array
    q : number of queries
    k : size of a given array in the main one
    */
    int n,q,k;
    cin >> n >> q;
    /*
    creating the main array of n elements, which is
    an array of pointers to the others arrays
    (can't create a 2 dimentional array since the arrays within "a" are not the same size)
    */
    int** a = new int*[n];
    //for each element in array a
    for(int i=0;i<n;i++){
        cin >> k;
        //creating a new array inside of the array a
        a[i] = new int[k];
        //filling  the array with values
        for(int j=0;j<k;j++){
            cin >> a[i][j];
        }
    }
    // executing the queries
    for(int l=0;l<q;l++){
        int i,j;
        // putting the values in the variables i and j
        cin >> i >> j;
        cout << a[i][j] << "\n";
    }
    
    
    
    return 0;
}