Complex sentence: BOAC Flight 777-A was a scheduled British Overseas Airways Corporation civilian airline flight from Portela Airport in Lisbon, Portugal, to Whitchurch Airport near Bristol, England, on 1 June 1943.
Split into simpler sentences: BOAC Flight 777-A known as British Overseas Airways Corporation, was a scheduled civilian airline flight from the Portela Airport in Lisbon, Portugal, to the Bristol Airport. Near Bristol, England, on 1 June 1943.