TASK DEFINITION: Given a context passage, generate a question from the passage such that its answer is shortest continous span from the passage.
PROBLEM: Zeke Bella died on November 17, 2013, from complications due to a stroke, and the injuries received from a fall it induced;

SOLUTION: What was Zeke Bella's cause of death?

PROBLEM: 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.

SOLUTION: The art style of Witte Huis is what?

PROBLEM: Viewed as paranoid and dangerous, An Lushan was assassinated in 757 by his own son, An Qingxu, after which the state of Yan continued to spiral into a turmoil that eventually led to its collapse in 763.

SOLUTION:
What noble family was An Lushan part of?