Complex sentence: The Zagat Survey or was established by Tim and Nina Zagat in 1979 as a way to collect and correlate the ratings of restaurants by diners; for their first guide, covering New York City, the Zagats surveyed their friends.
Split into simpler sentences: The Zagat Survey or was established by Tim and Nina Zagat in 1979 as a way to collect and correlate the ratings of restaurants by diners. For their first guide, covering New York City, the Zagats surveyed their friends.