Complex sentence: The Avro Canada CF-100 "Canuck", (affectionately known as the "Clunk"), was a Canadian jet fighter used during the Cold War, and was the only Canadian-designed fighter to enter mass-production.
Split into simpler sentences: The Avro Canada CF-100 "Canuck", (affectionately known as the "Clunk"), was a Canadian jet fighter serving during the Cold War. It was the first and only Canadian-designed fighter to enter mass-production.