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 1983 that Hurricane Alicia hits the Texas coast, killing 22 people and causing over USD $1 billion in damage (1983 dollars).