Assertion: semaphore | /r/CapableOf | use flag
Facets:
value: to send messages
type: PURPOSE
Source sentences:
text: Semaphore was a process of communication using flags to send messages,primarily between sailing vessels.
text: Semaphore is a way to signal the alphabet using two flags, one held in each hand.
text: Semaphore was a process of communication using flags to send messages,primarily between sailing vessels.