general_fact: 28961 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 28961 is a boring number.
trivia: 28961 is an unremarkable number.
historical_date: April 16th is the day in 1992 that the Katina P. runs aground off of Maputo, Mozambique and 60,000 tons of crude oil spill into the ocean.