Assertion: time travel | /r/CapableOf | inspire thorne
Facets:
value: to examine the concept
type: PURPOSE
Source sentences:
text: In the early 1980s, while Carl Sagan worked on his 1985 novel Contact, he approached Kip Thorne with a question about the physics of time travel, which inspired Thorne to examine the concept of using a black hole as a means of time travel.