general_fact: 4471 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 4471 is an uninteresting number.
trivia: 4471 is an unremarkable number.
historical_date: March 28th is the day in 1969 that Greek poet and Nobel Prize laureate Giorgos Seferis makes a famous statement on the BBC World Service opposing the junta in Greece.