Melanie Clark of Livermore, Calif., asks why promotional clips for upcoming films are called “trailers,” when they’re shown before the main attraction. The answer is: Because they were originally shown after the main attraction. This was changed because many moviegoers left right after the film ended.

In 2002, Liverpool’s airport was renamed for one of the Beatles, who were all natives of the city. Which Beatle was so honored?

A) John Lennon

B) Paul McCartney

C) George Harrison

D) Ringo Starr

Saturday’s answer: John McIntosh discovered the tree bearing the apples named for him on his farm in Ontario, Canada.