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

Example Input: Almost nothing is left of the Bastille except some remains of its stone foundation that were relocated to the side of the Boulevard Henri IV. Historians were critical of the Bastille in the early 19th century, and believe the fortress to have been a relatively well-administered institution, but deeply implicated in the system of French policing and political control during the 18th century.
Example Output: What material was used for Bastille?

Example Input: Conus velaensis is a species of sea snail, a marine gastropod mollusk in the family Conidae, the cone snails and their allies.
Example Output: Is Conus velaensis a genus or species?

Example Input: The company had an IPO on the NASDAQ in 1996 and in 1997 Europe's largest telecommunications company, Deutsche Telekom, bought a 21.1 percent stake in VocalTec for $48.3 million, in addition to purchasing $30 million in telephony products, services, and support over the following two-and-a-half years.
Example Output:
What stock exchange is VocalTec associated with?