Complex sentence: The aircraft was a Lockheed L-188C Electra four-engined turboprop airline registered as "N813H" and had first flown in January 1961 and was bought by American Flyers Airline in January 1963.
Split into simpler sentences: The aircraft was a Lockheed L-188C Electra four-engined turboprop airline registered as "N813H". It had first flown in January 1961 and was bought by American Flyers Airline in January 1963.