import java.util.*;

public class QueryPrinting {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        System.out.print("Enter n: ");
        int n = sc.nextInt();
        ArrayList<Integer>[] inpData = new ArrayList[n];

        int[] numEle = new int[n];
        for (int i = 0; i < n; i++) {
            inpData[i] = new ArrayList<Integer>();
            numEle[i] = sc.nextInt();
            for (int j = 0; j < numEle[i]; j++) {
                inpData[i].add(sc.nextInt());
            }
        }

        int nQuery = sc.nextInt();
        int[][] query = new int[nQuery][2];
        for (int i = 0; i < nQuery; i++) {
            for (int j = 0; j < 2; j++) {
                query[i][j] = sc.nextInt() - 1;
            }
        }

        for (int i = 0; i < nQuery; i++) {
            if (query[i][0] < n && query[i][1] < numEle[query[i][0]]) {
                System.out.println(inpData[query[i][0]].get(query[i][1]));
            } else {
                System.out.println("-1");
            }
        }

        sc.close();
    }

}