math_fact: 13706 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
trivia: 13706 is an unremarkable number.
historical_date: July 10th is the day in 1460 that Richard Neville, 16th Earl of Warwick defeats the king's Lancastrian forces and takes King Henry VI prisoner in the Battle of Northampton.