Assertion: zone's area | /r/HasProperty | military base
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Source sentences:
text: Area 51 is a military base located in southern Nevada at 37°14′06″N, 115°48′40″W. Owned by the United States government and operated by the United States air force this military base located at the elevation of 4,462 feet is a detachment of Edwards Air Force Base located in California in the Antelope Valley.