Task: Explanation
Input (English): "Moaning Lisa" is the sixth episode of "The Simpsons"<nowiki>'</nowiki> first season. It originally aired on the Fox network in the United States on February 11, 1990. The episode was written by Al Jean and Mike Reiss, and was directed by Wes Archer. Ron Taylor guest stars in the episode as Bleeding Gums Murphy. The episode deals with Lisa's depression and her attempts to sublimate it by playing her saxophone. It received positive reviews from television critics. Question: The Simpsons episode "Moaning Lisa" and "The Simpsons Sing the Blues" were both released what year? Answer: 1990
Output (English):  It originally aired on the Fox network in the United States on February 11, 1990.