Assertion: mariana trench | /r/HasProperty | surveyed by another royal navy vessel
Facets:
value: after its original discovery
type: TEMPORAL
value: in 1951
type: TEMPORAL
Source sentences:
text: In 1951, 76 years after its original discovery, the entire Mariana Trench was surveyed by another Royal Navy vessel, also named HMS Challenger, after the original expedition ship.