N = int(input()) # members
members = [list(map(int, input().rstrip().split(' '))) for i in range(0, N)]

M = int(input()) # mentaiko
mentaiko = [list(map(int, input().rstrip().split(' '))) for i in range(0, M)]

counts = [0 for _ in range(0, M)]
miracle_idx = -1
max_val = -1

for member in members:
    for (idx, m) in enumerate(mentaiko):
        if (member[0] >= m[0] and member[1] <= m[1]):
            counts[idx] += 1
            if max_val < counts[idx]:
                max_val = counts[idx]
                miracle_idx = idx

print("{}".format(miracle_idx + 1 if miracle_idx > 0 else 0))