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: Paul MacEwan (born April 8, 1943) is a former politician in Cape Breton Island, Nova Scotia, Canada, and long-time member of the Nova Scotia House of Assembly. 
 Question: What is the position of Paul MacEwan?

A: member of the nova scotia house of assembly
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Q: Context: The Pier 21 Society opened an interpretive centre in part of the former immigration facility in 1999. 
 Question: What year was Pier 21 opened?

A: 1999
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Q: Context: Sleep disorders are frequent comorbidities in neurologic patients. This review focuses on clinical aspects and prognosis of 3 neurologic sleep disorders: narcolepsy, restless legs syndrome/Willis-Ekbom disease (RLS/WED), and REM sleep behavior disorder (RBD). Narcolepsy causes pervasive, enduring excessive daytime sleepiness, adversely affecting patients' daily functioning. RLS/WED is characterized by an uncomfortable urge to move the legs before sleep, often evolving toward augmentation and resulting in daylong bothersome symptoms. RBD causes potentially injurious dream enactment behaviors that often signify future evolution of overt synucleinopathy neurodegeneration in as many as 81% of patients. Timely recognition, referral for polysomnography, and longitudinal follow-up of narcolepsy, RLS/WED, and RBD patients are imperatives for neurologists in providing quality comprehensive patient care. 
 Question: Willis-Ekbom disease is also known as?

A:
restless legs syndrome
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