Assertion: semaphore's arm | /r/HasProperty | connected by crossbar
Facets:
Source sentences:
text: The finalized devices consisted of two six-foot wooden arms connected by a crossbar — the positions of all three together could be used to indicate a letter.
text: Their semaphore was composed of two black movable wooden arms, connected by a cross bar; the positions of all three of these components together indicated an alphabetic letter.