Question: What is the establishment year of this military base north of the city of Concord, California at the shore of the Sacramento River and adjacent to Shore Acres, California?
Sentence (from "Shore Acres, California"): 60% of residents of the zip code spoke English as their primary language, while 40% did not, of those who did not, 27% spoke Spanish, 6% spoke Tagalog, and 1% spoke Vietnamese, the remaining 6% spoke other languages none of which were spoken by more than 1% of the population.
Relevant evidence: No