Question: John Kenley, was an American theatrical producer who pioneered the use of television stars in summer stock productions, his Kenley Players company was described by Variety as "the largest network of theaters on the straw-hat circuit.", it was an Equity summer stock theatre company which presented hundreds of productions featuring Broadway, film, and television stars in Midwestern cities between 1940 and which year?
Sentence (from "Kenley Players"): Founded by and operated for its entire lifespan by John Kenley, it is credited with laying the groundwork for Broadway touring companies.
Relevant evidence: No