using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace yuki0647
{
    class Program
    {
        static void Main(string[] args) {
            var n = int.Parse(Console.ReadLine());
            var members = new List<Tuple<int, int>>();
            for(var i = 0; i != n; ++i) {
                var ab=Console.ReadLine().Split().ToList().ConvertAll(int.Parse);
                members.Add( Tuple.Create<int, int>(ab[0], ab[1]));
            }
            var m = int.Parse(Console.ReadLine());
            var mentaikos = new List<Tuple<int, int>>();
            for(var i = 0; i != m; ++i) {
                var xy = Console.ReadLine().Split().ToList().ConvertAll(int.Parse);
                mentaikos.Add( Tuple.Create<int, int>(xy[0], xy[1]));
            }

            var mentaikoCount = new int[m + 1];
            for(var i_member = 0;i_member != n;++i_member) {
                for(var j_mentaiko = 0;j_mentaiko != m;++j_mentaiko) {
                    if(mentaikos[j_mentaiko].Item1 <= members[i_member].Item1 && mentaikos[j_mentaiko].Item2 >= members[i_member].Item2)
                        ++mentaikoCount[j_mentaiko];
                }
            }

            var maxCount = mentaikoCount.Max();
            if(maxCount == 0) Console.WriteLine(0);
            else {
                for(var i = 0; i != m; ++i) {
                    if(mentaikoCount[i] == maxCount)
                        Console.WriteLine(i + 1);
                }
            }
        }
    }
}