instruction:
In this task, you're given a context, further information available on a particular linked term from the statement, and an answer term. Your job is to generate a question that can use the information provided to obtain the given answer. You should use the information on both context and link information to create the question. Note that the answer to the question should be exactly the given answer, and if the answer is none, the answer to the question shouldn't be obtainable from the context or linked information.
question:
Context: The new King, Edward IV, marched north and sealed his reign with the bloody victory at the Battle of Towton, following which his brother was beheaded. Link Information: A newsletter dated 4 April 1461 reported a widely circulated figure of 28,000 casualties Answer: 28,000
answer:
How many casualties were there in the battle after which Edward IV's brother was beheaded?


question:
Context: the group originally included lead vocalist Keith Relf Link Information: The Yardbirds are an English blues rock band from London. Formed in May 1963, the group originally included lead vocalist Keith Relf Answer: Robert Plant
answer:
Which person was the lead singer of the Yardbirds the longest?


question:
Context: In 2011 he won with this national team three medals. On July 10, 2011 achieved bronze of World League 2011. Link Information: none Answer: none
answer:

What teams won silver and gold in the World League 2011?