Assertion: metric system's unit | /r/HasProperty | mandatory
Facets:
value: on new signs
type: LOCATION
value: after march
type: TEMPORAL
Source sentences:
text: Imperial units are mandatory on this class of sign; metric units are also mandatory on new signs after March 2015.
text: Imperial units are mandatory on this class of sign; metric units are also mandatory on new signs after March 2015.