Assertion: tractor | /r/HasProperty | produced before this year
Facets:
Source sentences:
text: ROPS were first required in the United States in 1986, but this requirement did not retroactively apply to tractors produced before this year; therefore, adoption of ROPS has been incomplete in the farming community.
text: ROPS were first required in the United States in 1986, but this requirement did not retroactively apply to tractors produced before this year; therefore, adoption of ROPS has been incomplete in the farming community.