In November of 1915, inventor Thomas Edison visited the cave and was particularly interested in the electrical lighting system for the cave.
(inventor Thomas Edison; visited; the cave; T:In November of 1915) (inventor Thomas Edison; was; particularly interested in the electrical lighting system for the cave; T:In November of 1915)
inventor Thomas Edison inventor Thomas Edison
visited was
the cave T:In November of 1915
particularly interested in the electrical lighting system for the cave T:In November of 1915