Complex sentence: Willows moved to Birmingham to build his next airship the "Willows No.4", first flown in 1912 it was sold to the Admiralty for £1,050 and it became His Majesty's Naval Airship No.2.
Split into simpler sentences: Willows moved to Birmingham to build his next airship the "Willows No.4". First flown in 1912, it was sold to the Admiralty for £1,050 and it became His Majesty's Naval Airship No.2.