Analyze the relationship between 'Quentin Purdy' and 'District Judge' within the context of the input sentence.
Options: position held, chief executive officer, publisher, location of formation

But District Judge Quentin Purdy rejected the application, saying he did not think expert evidence would be relevant to what he had to decide - which was not the facts of the case but rather whether the U.S. charges would also be offences under English law.
position held