Sentence: The mayor is the leader of Antioch which is in the San Francisco Bay Area in Contra Costa County in California and they Spanish is spoken.

What structured data could we extract from this sentence?
Contra Costa County, California, isPartOf, San Francisco Bay Area; Antioch, California, isPartOf, California; Antioch, California, isPartOf, Contra Costa County, California; Antioch, California, leaderTitle, Mayor; California, language, Spanish language