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: In addition to Shahrbanu, the historian Al-Masudi provides the names of four other children of Yazdegerd III; two sons, namely Peroz and Bahram Link Information: none Answer: none

Answer: Which of the sons was born first?


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: The only description of his life comes from the Brevarium Aberdonense, which was published in Edinburgh in 1509 - 1510. Link Information: none Answer: none

Answer:
How old was the city in which a work about Saint Monan's life was published in 1509?