Complex sentence: Two prototypes flown as XNQ-1 (75725/75726), Delivered to the US Navy in 1947, after trials flown by Commander Robert M. Soule, they were rejected.
Split into simpler sentences: Two prototypes flown as XNQ-1 (BuNos.75725 & 75726) were delivered to the US Navy in 1947. After trials flown by Commander Robert M. Soule, they were rejected.