Assertion: room's size | /r/HasProperty | measured by the number of tatami mats
Facets:
value: in japan
type: LOCATION
value: often
type: TEMPORAL
Source sentences:
text: In Japan, the size of a room is often measured by the number of tatami mats (-畳, -jō), about 1.653 square meters (for a standard Nagoya size tatami).