Assertion: yeti's book | /r/HasProperty | mount everest
Facets:
Source sentences:
text: The incident is mentioned in his book ‘Mount Everest: the reconnaissance, 1921’.
text: Abominable Snowman” came into use in 1921 when Charles Howard-Bury led an expedition to Mount Everest and in his book, Mount Everest
text: In his book 'Mount Everest