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.

[Q]: Context: In 1888, an introduction by conductor Alberto Randegger to theatre manager Richard Mansfield led to German's appointment as conductor and musical director at the Globe Theatre in London. Link Information: none Answer: none
[A]: Did Alberto Randegger and Richard Mansfield have any collaborative works together?


[Q]: 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
[A]: Which person was the lead singer of the Yardbirds the longest?


[Q]: Context: These neurons have high activation during wakefulness and during REM sleep and a low activation during NREM sleep Link Information: none Answer: none
[A]:
which phase of sleep is the longest?