Question: What city did the book for which the Democratic candidate in  the 1934 California gubernatorial election was known took place?
Sentence (from "California gubernatorial election, 1934"): Held in the midst of the Great Depression, the 1934 election was amongst the most controversial in the state's political history, pitting conservative Republican Frank Merriam against former Socialist Party member turned Democrat Upton Sinclair, author of "The Jungle".
Relevant evidence: Yes