What sport has thirteen players per team in "league" rules but fifteen in "union" play?

More Questions:

In 1968, what became a required part of the automobile's safety equipment in the US?

Which drug, later found to have devastating side effects, was launched in 1957 to help pregnant women overcome morning sickness?

What is "pub" short for?

What novel won Robert Penn Warren a Pulitzer Prize in 1947?

Which country borders Rwanda to the west?

Sofia is the capital of which nation?

What name is given to someone who keeps "apis mellifera"?

What is mixed with clay, baked in a kiln, and then pulverized in order to make Portland cement?

Which Star Trek character is a big fan of Earl Grey tea?

What political party was led until 1985 by the brutal Pol Pot?

What military legend was nicknamed "Mad Anthony"?

Who was assassinated by Yigal Amir?

In what country was Che Guevara born?

Giovanni Boccaccio's collection of novellas are known as what?

What year did Charles Dickens publish a novella entitled "A Christmas Carol"?