Assertion: factory | /r/HasProperty | about 10 times the size
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Source sentences:
text: The factory was about 10 times the size Tesla initially needed, and much of the 370-acre (16,000,000 sq ft; 1,500,000 m2) site was unused in 2013, with most activity concentrated in the 5,500,000-square-foot (510,000 m2) main building that does the final assembly of vehicles.