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"extract": "STS-41-B was NASA\u0027s tenth Space Shuttle mission and the fourth flight of the Space Shuttle Challenger. It launched on February 3, 1984 and landed on February 11, 1984, after deploying two communications satellites. It was also notable for including the first untethered spacewalk.",
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"description": "American aviator and astronaut (1937\u20132017)",
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"description": "American brigadier general and astronaut (born 1942)",
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"extract": "Robert Lee Stewart is an American retired military officer and NASA astronaut who was a brigadier general of the United States Army.",
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"text": "During the Space Shuttle Challenger mission STS-41-B, astronauts Bruce McCandless\u00a0II and Robert L. Stewart performed the first untethered spacewalk (pictured).",
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"text": "During the Space Shuttle Challenger mission STS-41-B, astronauts Bruce McCandless\u00a0II and Robert L. Stewart performed the first untethered spacewalk (pictured).",
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