general_fact: 139 is the atomic number of Untriennium, an unsynthesized chemical element.
math_fact: 139 is the smallest factor of 64079, the smallest composite Lucas number with a prime index.
trivia: 139 is the number of episdoes of the TV series MacGyver that ran on ABC from 1985 to 1992.
historical_date: May 18th is the day in 1860 that Abraham Lincoln wins the Republican Party presidential nomination over William H. Seward, who later becomes the United States Secretary of State.