Complex sentence: "The Heart Is a Lonely Hunter" is the seventh episode of the American Fairy Tale/Drama television series "Once Upon a Time", which aired in the United States on ABC on December 11,2011.
Split into simpler sentences: The Heart Is a Lonely Hunter is the seventh episode of the American Fairy Tale/Drama television series "Once Upon a Time". It first aired in the United States on ABC on December 11,2011.