Assertion: semaphore's arm | /r/HasProperty | lowered with green light
Facets:
value: to slacken speed
type: PURPOSE
value: for caution
type: PURPOSE
Source sentences:
text: The arm was lowered 45 degrees, with a green light for Caution, to "slacken speed", and to an almost vertical position in a slotted post with a white light for All Right.