Assertion: national park's mile | /r/HasProperty | 390 km
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Source sentences:
text: Approximately 35,600 acres (55.6 sq mi; 144.1 km2) of man-made wetlands are to be constructed to confine contaminated water before it is released to the Everglades, and 240 miles (390 km) of canals that divert water away from the Everglades are to be destroyed.