Assertion: typhoon's system | /r/CapableOf | move on september
Facets:
value: west-northwestward
type: OTHER
value: further west
type: LOCATION
Source sentences:
text: On September 29, the system moved further west, found itself in favorable conditions for strengthening, and became a tropical storm.
text: The system moved west-northwestward on September 22, under the influence of a subtropical ridge to its north.