Assertion: spacecraft's speed | /r/HasProperty | 2,756 m/s
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Source sentences:
text: The first stage burned for about 2 minutes and 41 seconds, lifting the rocket to an altitude of 42 miles (68 km) and a speed of 6,164 miles per hour (2,756 m/s) and burning 4,700,000 pounds (2,100,000 kg) of propellant.