Question: The Helicon Home Colony was an experimental community formed by author Upton Sinclair using proceeds from what novel that portrayed the harsh conditions and exploited lives of immigrants in the United States in Chicago and similar industrialized cities? 
Sentence (from "King Coal"): King Coal is a 1917 novel by Upton Sinclair that describes the poor working conditions in the coal mining industry in the western United States during the 1910s, from the perspective of a single protagonist, Hal Warner.
Relevant evidence: No