Assertion: carrier's system | /r/HasProperty | developed in 1960
Facets:
value: by missionaries
type: OTHER
value: by a group of carrier people
type: OTHER
Source sentences:
text: The writing system in general use today is the Carrier Linguistic Committee writing system, a Roman-based system developed in the 1960s by Summer Institute of Linguistics missionaries and a group of Carrier people with whom they worked.