int main() {
    
    int array_size, number_of_queries;
    
    cin >> array_size >> number_of_queries;
    
    vector<int> array_of_vectors[array_size];
    
    for (int i = 0; i < array_size; i++) {
        int vector_size;
        
        cin >> vector_size;

        array_of_vectors[i] = vector<int>(vector_size);

        for (int j = 0; j < vector_size; j++) {
            cin >> array_of_vectors[i][j];
        }
    }
    
    for (int i = 0; i < number_of_queries; i++) {
        int n_vector, n_element;
        
        cin >> n_vector >> n_element;
        cout << array_of_vectors[n_vector][n_element] << endl;
    }
    
    return 0;
}