general_fact: 40966 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 40966 is an uninteresting number.
trivia: 40966 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
historical_date: February 28th is the day in 1939 that the erroneous word "dord" is discovered in the Webster's New International Dictionary, Second Edition, prompting an investigation.