Assertion: challenger deep | /r/HasProperty | western basin
Facets:
Source sentences:
text: The first definitive verification of both depth and location of the Challenger Deep (western basin) was determined by Dr. R. L. Fisher from the Scripps Institution of Oceanography, aboard the 325-ton research vessel Stranger.
text: Fisher noted that this survey of the Challenger Deep (western basin) had "...provided nothing to support and much to refute recent claims of depths there greater than 10,915 metres (35,810 ft) ±20 m (66 ft).