general_fact: 4845 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 4845 is an uninteresting number.
trivia: 4845 is an unremarkable number.
historical_date: April 6th is the day in 1893 that Salt Lake Temple of The Church of Jesus Christ of Latter-day Saints is dedicated by Wilford Woodruff.