import java.io.*;
import java.util.*;


public class Main_yukicoder647 {

	private static Scanner sc;
	private static Printer pr;

	private static void solve() {
		int n = sc.nextInt();

		int[] a = new int[n];
		int[] b = new int[n];
		for (int i = 0; i < n; i++) {
			a[i] = sc.nextInt();
			b[i] = sc.nextInt();
		}

		int m = sc.nextInt();

		int[] x = new int[m];
		int[] y = new int[m];
		for (int i = 0; i < m; i++) {
			x[i] = sc.nextInt();
			y[i] = sc.nextInt();
		}

		int[] cnt = new int[m];
		int max = 0;
		for (int i = 0; i < n; i++) {
			for (int j = 0; j < m; j++) {
				if (x[j] <= a[i] && y[j] >= b[i]) {
					cnt[j]++;
					max = Math.max(max, cnt[j]);
				}
			}
		}

		if (max == 0) {
			pr.println(0);
		} else {
			for (int i = 0; i < m; i++) {
				if (cnt[i] == max) {
					pr.println(i + 1);
				}
			}
		}
	}

	// ---------------------------------------------------
	public static void main(String[] args) {
		sc = new Scanner(System.in);
		pr = new Printer(System.out);

		solve();

		pr.close();
		sc.close();
	}

	private static class Printer extends PrintWriter {
		Printer(PrintStream out) {
			super(out);
		}
	}
}