Complex sentence: The building, designed by Emery Roth and Sons, was built in 1970 on the site of the Capitol Theatre movie house by the Uris brothers who at the time claimed to be the largest private developers in New York City.
Split into simpler sentences: The building, designed by Emery Roth and Sons, was built in 1970 on the site of the former Capitol Theatre movie palace. It was developed by the Uris brothers, who, at the time, claimed to be the largest private real estate developers in New York City.