general_fact: 231 is the number of cubic inches in a U.S. liquid gallon.
math_fact: 231 is the number of partitions of 16.
trivia: 231 is the number of cubic inches in a U.S. liquid gallon.
historical_date: August 18th is the day in 1977 that Steve Biko is arrested at a police roadblock under the Terrorism Act No 83 of 1967 in King William's Town, South Africa.