Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.

And Another Thing... by Eoin Colfer, published in 2009, eight years after the death of the author of the first five, is described as the sixth in which trilogy of books?
and another thing...

Which future Nobel Prize winner did Bill Clinton choose as his Vice President?
vice president of the united states

Which team has played in 40 of the 105 Baseball World Series and won 27 World Series championships (between 1923 and 2009), the most of any Major League franchise?

baseball