n The Curse of Billy Penn: Since the 1987 construction of Philadelphia’s One Liberty Place, which exceeded the height of William Penn’s statue atop City Hall, none of the city’s major sports teams has won a championship.

With three incumbent U.S. senators in the running for the presidency as of this writing, we offer this relevant question: How many incumbent U.S. senators were elected president in the last 100 years, that is, from 1908 until now?

A) None

B) 2

C) 4

D) 7

Monday’s answer: Scottish-born Mungo Park was an explorer of Africa in the late 18th and early 19th centuries.