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

It was the last KH-2 Corona' satellite, which was based on an Agena-B. The launch of Discoverer 28 occurred at 00:01 UTC on 4 August 1961.
When was the launch date of Discoverer 28?

Brepols was once one of the largest printing companies of the world and one of the main employers in Turnhout (Belgium).
In what city or state did the formation of Brepols occur?

The Stadio Olimpico is the home of San Marino Calcio in Serravalle and was constructed in 1969.

What stadium was San Marino Calcio?