int main() {
    int n, q;
    cin >> n >> q;  
    vector<vector<int>> arrays(n);
    
    for (int i = 0; i < n; i++) {
        int k; cin >> k; 
        vector<int> inner(k);  
        for (int j = 0; j < k; j++) {
            cin >> inner[j];  
        }
        arrays[i] = inner; 
    }    
    
    while(q--) {
        int i, j; cin >> i >> j; 
        cout << arrays[i][j] << endl; 
    }
    return 0;
}