Question: Enoch Bolles' most widely reproduced advertising illustration is for a manufacturing company located where?
Sentence (from "Standard Sanitary Manufacturing Company"): It was formed in 1899 by the merger of the Ahrens and Ott Manufacturing Company, the Standard Manufacturing Company, the Dawes and Myler Manufacturing Company, and 6 other plants which were consolidated to form the Standard Manufacturing Company, headquartered in Pittsburgh, with Theodor Ahrens (Jr.) as its first president.
Relevant evidence: No