Complex sentence: The 1977 ABN World Tennis Tournament was a tennis tournament played on indoor carpet courts at the Ahoy Rotterdam in Rotterdam, The Netherlands that was part of the 1977 Colgate-Palmolive Grand Prix circuit.
Split into simpler sentences: The 1977 ABN World Tennis Tournament was a tennis tournament played on indoor carpet courts at Ahoy Rotterdam in the Netherlands. It was part of the 1977 Colgate-Palmolive Grand Prix circuit.