general_fact: 693 is the number of sections in Ludwig Wittgenstein's Philosophical Investigations.
math_fact: 693 is an unremarkable number.
trivia: 693 is the number of sections in Ludwig Wittgenstein's Philosophical Investigations.
historical_date: November 23rd is the day in 1963 that the BBC broadcasts the first ever episode of Doctor Who (starring William Hartnell) which is the world's longest running science fiction drama.