general_fact: 140 is the character-entry limit for Twitter, a well-known characteristic of the service (based on the text messaging limit).
math_fact: 140 is a harmonic divisor number.
trivia: 140 is the character-entry limit for Twitter, a well-known characteristic of the service (based on the text messaging limit).
historical_date: May 19th is the day in 2010 that the Royal Thai Armed Forces concludes its crackdown on protests by forcing the surrender of United Front for Democracy Against Dictatorship leaders.