What is the relationship between Vertex Pharmaceuticals and Boston in the context of the input sentence. Choose an answer from: product/material produced; manufacturer; distributed by; industry; position held; original broadcaster; owned by; founded by; distribution format; headquarters location; stock exchange; currency; parent organization; chief executive officer; director/manager; owner of; operator; member of; employer; chairperson; platform; subsidiary; legal form; publisher; developer; brand; business division; location of formation; creator.

Vertex Pharmaceuticals Inc. VRTX, +4.02% shares were halted, but up 3.7%, after the Boston Globe reported that the biotech received marketing approval for a cystic fibrosis treatment.

Answer: headquarters_location