Question: What Cartoon Network television series originally aired in the United States on May 8, 2011 and May 15, 2015?
Sentence (from "Regular Show (season 1)"): Many of the characters are loosely based on those developed for J.G. Quintel's student films at California Institute of the Arts: "The Naïve Man From Lolliland" and "2 in the AM PM".
Relevant evidence: No