Teacher:Given a context passage, generate a question from the passage such that its answer is shortest continous span from the passage.
Teacher: Now, understand the problem? Solve this instance: 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.
Student:
Which chromosome is the gene ETHE1 located on?