cin >> n >> q;
int** arr = new int*[n];
for(unsigned int h = 0; h < n; ++h)
{
    cin >> k;
    *(arr + h) = new int[k];
    for(unsigned m = 0; m < k; ++m) {cin >> *(*(arr + h)+ m);}
}
for(unsigned int h = 0; h < q; h++){cin >>i >>j; cout << *(*(arr + i)+ j) << endl;}