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.

[EX Q]: Context: Mutations in the solute carrier family 9, subfamily A member 6 (SLC9A6) gene, encoding the endosomal Na+/H+ exchanger 6 (NHE6) are associated with Christianson syndrome, a syndromic form of X-linked intellectual disability characterized by microcephaly, severe global developmental delay, autistic behavior, early onset seizures and ataxia. In a 7-year-old boy with characteristic clinical and neuroimaging features of Christianson syndrome and epileptic encephalopathy with continuous spikes and waves during sleep, we identified a novel splice site mutation (IVS10-1G>A) in SLC9A6. These findings expand the clinical spectrum of the syndrome and indicate NHE6 dysfunction as a new cause of electrical status epilepticus during slow-wave sleep (ESES).
Question: Mutation of which gene is implicated in the Christianson syndrome?
[EX A]: slc9a6

[EX Q]: Context: While performing on her Intimate and Live concert tour in Australia, Minogue confirmed that she would release ''Cowboy Style'' as the fourth single in Australia and New Zealand by Mushroom Records.
Question: Which was the record label for Cowboy Style?
[EX A]: mushroom records

[EX Q]: Context: Take Shelter premiered in January 2011 at the Sundance Film Festival, and Sony Pictures Classics acquired rights to distribute the film in North America, Latin America, Australia, and New Zealand.
Question: What was the production company for Take Shelter?
[EX A]:
sony pictures classics