Question: What is this labor union in North America that had over a million members in 2013 and also worked with the insurance agency owner, and consultant Allen Dorfman?
Sentence (from "International Brotherhood of Teamsters"): Formed in 1903 by the merger of several local and regional locals of teamsters, the union now represents a diverse membership of blue-collar and professional workers in both the public and private sectors.
Relevant evidence: No