Complex sentence: The 905th Air Refueling Squadron is an inactive United States Air Force unit, that was last active as an element of the 319th Air Refueling Wing at Grand Forks Air Force Base, North Dakota, where it operated Boeing KC-135 Stratotanker aircraft.
Split into simpler sentences: The 905th Air Refueling Squadron is an inactive United States Air Force unit. It was last active as an element of the 319th Air Refueling Wing at Grand Forks Air Force Base, North Dakota, where it operated Boeing KC-135 Stratotanker aircraft.