Given the input sentence, please extract the subject and object containing a certain relation in the sentence according to the following relation types, in the format of "relation1: word1, word2; relation2: word3, word4". Relations include: 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.
Text: Our work with the New York City Department of Transportation to expand the number of school zone speed enforcement areas continues ahead apace, and we are excited to be able to bring this important public safety initiative to fruition even during these challenging times.
user
headquarters_location: initiative, New York City
assistant