You will be given a definition of a task first, then some input of the task.
Given a context passage, generate a question from the passage such that its answer is shortest continous span from the passage.

The Witte Huis (Dutch pronunciation: (t ys)) or White House is a building and National Heritage Site in Rotterdam, Netherlands, built in 1898 in the Art Nouveau style.
Output:
The art style of Witte Huis is what?