Given a context passage, generate a question from the passage such that its answer is shortest continous span from the passage.

[Q]: The DRG Class 99.19 engines were metre gauge, ten-coupled, superheated, steam locomotives that were employed in the southwestern German state of Wurttemberg from 1927.
[A]: What was the year that DRG Class 99.19 entered service?


[Q]: The Volvo B12M is an underfloor-engined bus/coach chassis introduced by Volvo Buses in 2001 as a replacement for the Volvo B10M.
[A]: What year was Volvo B12M commissioned?


[Q]: Fergus Crane is a children's book written by Paul Stewart and illustrated by Chris Riddell, published in 2004.
[A]:
Who was Fergus Crane illustrated by?