Instructions: 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.
Input: Context: Protein ETHE1, mitochondrial , also known as ''ethylmalonic encephalopathy 1 protein'' and ''per sulfide dioxygenase'', is a protein that in humans is encoded by the ETHE1 gene located on chromosome 19.
Question: Which chromosome is the gene ETHE1 located on?
Output:
chromosome 19