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: Damien Ryan (born 20 September 1979) is an Australian professional basketball player. 
 Question: Which sport does Damien Ryan practice?

A: basketball
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Q: Context: Tove Strand was formerly married to Rune Gerhardsen, a fellow Labour Party politician and son of former Prime Minister Einar Gerhardsen whom she met in university. 
 Question: What is Tove Strand's spouse's name?

A: rune gerhardsen
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Q: Context: Mutations in the tyrosine kinase (TK) domain of the epidermal growth factor receptor (EGFR) gene in non-small cell lung cancers are associated with increased sensitivity of these cancers to drugs that inhibit EGFR kinase activity such as gefitinib and erlotinib. Responses to TK inhibitors in the absence of EGFR gene mutation for BAC patients have not been reported. A case of a patient with BAC refractory to chemotherapy who responded to gefitinib in the absence of EGFR gene mutations is reported. Tyrosine kinase inhibitors may have a role in BAC in the absence of EGFR gene mutations. Additional studies on other molecular alterations of the EGFR family members are needed to better predict response to these agents. 
 Question: Mutations in which gene determine response to both erlotinib and gefitinib?

A:
epidermal growth factor receptor (egfr) gene
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