general_fact: 1066 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 1066 is a value of n for which 2f(n) = f(n+1).
trivia: 1066 is a boring number.
historical_date: December 1st is the day in 1990 that Channel Tunnel sections started from the United Kingdom and France meet 40 metres beneath the seabed.