Given a question and a context passage, generate the answer having the word or phrase from the context passage. Here, the answer should be a shortest continous span from the passage.

Q: Context: Jamie Wright (born May 13, 1976) is a Canadian former professional ice hockey left winger who played in the National Hockey League (NHL) with the Dallas Stars, Calgary Flames and Philadelphia Flyers. 
 Question: What team does Jamie Wright belong to?

A: dallas stars
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Q: Context: Ends and Means (an Enquiry Into the Nature of Ideals and Into the Methods Employed for Their Realization) is a book of essays written by Aldous Huxley. 
 Question: Which author wrote the novel titled Ends and Means?

A: aldous huxley
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Q: Context: Restless leg syndrome (RLS) and periodic limb movement disorder (PLMD) are considered to be a continuum of a neurological sleep disorder associated with abnormal iron metabolism or deficiency. I describe a case of RLS and PLMD in a cystic fibrosis patient with iron deficiency from chronic hemoptysis. This is the first case that reports RLS and PLMD manifesting from iron deficiency caused by chronic hemoptysis in advanced cystic fibrosis lung disease. 
 Question: Which deficiency is the cause of restless leg syndrome?

A:
iron
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