A survey of 1,015 tourists visiting Orlando was taken. Of those surveyed:
264 tourists had visited LEGOLAND
293 tourists had visited Universal Studios
54 tourists had visited both the Magic Kingdom and LEGOLAND
70 tourists had visited both the Magic Kingdom and Universal Studios
54 tourists had visited both LEGOLAND and Universal Studios
40 tourists had visited all three theme parks
97 tourists did not visit any of these theme parks
How many tourists only visited the Magic Kingdom (of these three)?