Analyze the relationship between 'Reddit' and 'SAN FRANCISCO' within the context of the input sentence.
Options: headquarters location, operator, member of, manufacturer

SAN FRANCISCO (MarketWatch) — Voat, a small social news and forum site that promises no censorship, has become a refuge for angry Reddit users, but the site’s creator says he plans to avoid the mistakes made by others, including the so-called “front page of the Internet.”
headquarters location