Assertion: metric system's unit | /r/HasProperty | customary
Facets:
Source sentences:
text: In 1866, after most of the South American countries started to use the metric system, the United States passed a law that allowed people to use either the metric system or United States customary units for trade.
text: In 1866, after most of the South American countries started to use the metric system, the United States passed a law that allowed people to use either the metric system or United States customary units for trade.
text: In 1866, after most of the South American countries started to use the metric system, the United States passed a law that allowed people to use either the metric system or United States customary units for trade.
text: Systems of measurement in modern use include the metric system, the imperial system, and United States customary units.