int main() {

int n, q, size, value, which, index;

cin >> n >> q;
vector<vector<int>> vec1; //initializing a 2d vector
for (int i = 0; i < n; ++i) {
    cin >> size;
    vector<int> vec2;
    for (int j = 0; j < size; ++j) {
        cin >> value;
        vec2.push_back(value);
    }
    vec1.push_back(vec2);
}
for (int k = 0; k < q; ++k) {
    cin >> which >> index;
    cout << vec1[which][index] << endl;
}  
return 0;

}