Assertion: salmon | /r/CapableOf | begin the migration
Facets:
value: back upstream
type: TRANSITIVE-OBJECT
value: upriver
type: LOCATION
value: to spawn
type: PURPOSE
value: in their natal stream
type: LOCATION
value: to reach their spawning ground
type: PURPOSE
Source sentences:
text: In their natal stream, salmon begin the migration upriver to reach their spawning ground.
text: Interestingly, once salmon start their migration back upstream to spawn, they do not eat.