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();
	}

}