instruction:
In this task, you're given a context, further information available on a particular linked term from the statement, and an answer term. Your job is to generate a question that can use the information provided to obtain the given answer. You should use the information on both context and link information to create the question. Note that the answer to the question should be exactly the given answer, and if the answer is none, the answer to the question shouldn't be obtainable from the context or linked information.
question:
Context: to jump across the Snake River Link Information: none Answer: none
answer:
How wide is the body of water that Evel Knievel attempted to jump across?


question:
Context: In 1979, he joined Emmylou Harris's backing band, the Hot Band Link Information: none Answer: none
answer:
How long had the Hot Band been active when Tony Brown joined them?


question:
Context: By 1968 regular air force military airlift squadrons were operating the Lockheed C-141 Starlifter, while reserve heavy airlift units still flew the obsolete Douglas C-124 Globemaster II Link Information:  the C-141 was designed to requirements set in 1960 and first flew in 1963. Production deliveries of an eventual 285 planes began in 1965: 284 for the Air Force, and one for the National Aeronautics and Space Administration (NASA) for use as an airborne observatory.  Answer: Douglas C-124 Globemaster II
answer:

Which aircraft was produced the most, the ones operated by air force military airlift squadrons or the heavy airlift units?