TASK DEFINITION: Given a context passage, generate a question from the passage such that its answer is shortest continous span from the passage.
PROBLEM: Munich sincerely invites you to join the 2016 0ktoberfest--the biggest celebration of its kind in Europe. Drink beer by the liter, eat traditional Bavarian food, listen to traditional Bavarian music as well as more up-to-date music, and enjoy yourself with hundreds of other people from all over the world, dancing and singing the hours away. Oktoberfest 2016 begins on Saturday 17th September and runs through to Monday 3rd October 2016. Don't miss the events during Oktoberfest! Grand entry of the Oktoberfest landlords and breweries Date: Saturday, 17th September 2016 Duration: about 45 minutes This is the official prelude to the opening of the Oktoberfest and involves about 1,000 participants, including the landlords' families in decorated carriages, the magnificent horse-drawn drays, waitresses on decorated floats and all the beer tent bands. Oktoberfest Costume and Riflemen-s Parade Date: Sunday, 18th September 2016 Duration:2-2 1/2 hours, about 8000 performers,7 km distance A varied succession of regional costume groups, "troops" in historical uniforms, marching bands, riflemen, thoroughbred horses, oxen, cows, goats, floats displaying typical local traditions and historic carriages all pass by in a 7-kilometer-long procession through the streets of the city center. Open-Air Oktoberfest Music Date: Sunday, 25th September 2016 Place: on the steps of the Bavaria statue At the traditional open-air concert on the second Sunday of the Oktoberfest, all the instruments that make up typical Bavarian wind band music can be heard. The bands from all of the tents come together at the steps under the Bavaria statue to play the most well-known songs and marches of Oktoberfest together while being conducted by distinguished Munich personalities.

SOLUTION: When will visitors see costume soldiers marching on the street?

PROBLEM: The Gruffalo is a children's book by writer and playwright Julia Donaldson, illustrated by Axel Scheffler, that tells the story of a mouse, the protagonist of the book, taking a walk in a European forest.

SOLUTION: What person illustrated The Gruffalo?

PROBLEM: PSR B1257+12 was discovered by the Polish astronomer Aleksander Wolszczan on February 9, 1990 using the Arecibo radio telescope.

SOLUTION:
What is the full date of discovery for PSR B1257+12?