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.
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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: overthrew King Hormizd IV Link Information: none Answer: none

Answer: Did the son of the overthrown king have any siblings?


Question: Context: In 1988, Duan Ju played for China in the 1988 Asian Cup and football match at the 1988 Olympic Games Link Information: none Answer: none

Answer:
What was the result for the China football team in the 1988 Olympic Games?