Complex sentence: "Simon & Marcy" aired on March 25,2013, together with a re-run of the fourth season episode "I Remember You", and was advertised by Cartoon Network as a "half-hour special".
Split into simpler sentences: Simon & Marcy aired on March 25,2013, together with the fourth season episode "I Remember You". As such, it was advertised by Cartoon Network as a "half-hour special".