Question: What is the official website of the American football team whose headquarter location is Los Angeles ?
Options:
http://www.docsguitar.com/
http://www.criticschoice.com/movie-awards/
http://www.emimusic.jp/
http://www.chargers.com
http://www.saic.edu
http://chinese.spbu.ru/
http://www.ci.helena.mt.us
http://www.norfolk.gov
http://www.rosscountyfootballclub.co.uk/
http://www.nbc.com/constantine