package m.shin;
import java.util.Scanner;
public class Con647 {

	public static void main(String[] args) {
		Scanner s = new Scanner(System.in);
		int N = s.nextInt();
		int[][] ab = new int[N][2];
		for(int i = 0;i < N;i++){
			ab[i][0] = s.nextInt();
			ab[i][1] = s.nextInt();
		}
		int M = s.nextInt();
		int[] count = new int[M];
		for(int i = 0;i < M;i++){
			int x = s.nextInt() , y = s.nextInt();
			for(int j = 0;j < N;j++){
				if(ab[j][0] >= x && ab[j][1] <= y){
					count[i]++;
				}
			}
		}
		s.close();

		N = 0;
		for(int i = 0;i < 2;i++){
			for(int j = 0;j < M;j++){
				if(i == 0){
					if(count[j] >= count[N]){
						N = j;
					}
				}else{
					if(count[j] ==count[N] && count[N] != 0){
						System.out.println(j+1);
					}else if(count[N] == 0){
						System.out.println(0);
						break;    //未完成
					}
				}
			}
		}
	}

}