Question: When was the album that has the song "Piggy" released?

Context paragraphs:
Kermit Unpigged: Kermit Unpigged is a music and comedy record released by The Jim Henson Company through BMG Kidz in 1994, and the last album released by Jim Henson Records.  The record’s title is a clear parody of the MTV series “MTV Unplugged”, and the cover is a parody of Eric Clapton's "Unplugged" album cover as well.  The album consisted of Kermit and the other Muppets getting lost at a recording studio and encountering celebrities including Linda Ronstadt, with whom Kermit sang “All I Have to Do is Dream”, Vince Gill who sang “Daydream” with Kermit, Jimmy Buffett who sang “Mr. Spaceman” with Gonzo, and Ozzy Osbourne with whom Miss Piggy sang “Born to be Wild.”  The album ends with all The Muppets meeting back up and singing the Beatles song “All Together Now.”

Piggy (song): "Piggy" is a song by American industrial rock band Nine Inch Nails from their second studio album, "The Downward Spiral" (1994).  It was written by Trent Reznor, co-produced by Flood, and recorded at Le Pig (10050 Cielo Drive).  It was released in December 1994 as a promotional single from the album.  The song is known for being Reznor's only live drumming performance.

Piggy Bank (song): "Piggy Bank" is the fifth track from 50 Cent's second album, "The Massacre".  It was not released as a single, but charted at eighty-eight on the "Billboard" Hot 100 due to controversy over its attack on long-time rival Ja Rule, as well as Jadakiss and Fat Joe, who had worked with Ja Rule on his song "New York".  The song also takes lyrical swipes at rappers Shyne, Kelis, Sheek Louch, Cassidy, Lil' Kim (who featured 50 Cent on her song "Magic Stick") and Nas.  He also mentions Tupac Shakur, Jay-Z, Mobb Deep and Michael Jackson in the song, but not negatively.

The Downward Spiral: The Downward Spiral is the second studio album by American industrial rock band Nine Inch Nails, released on March 8, 1994, by Nothing Records and Interscope Records in the United States and by Island Records in Europe.  It is a concept album detailing the destruction of a man from the beginning of his "downward spiral" to his attempt at suicide.  "The Downward Spiral" features elements of industrial rock, techno and heavy metal music, in contrast to the band's synthpop-influenced debut album "Pretty Hate Machine" (1989), and was produced by Nine Inch Nails frontman Trent Reznor and Flood.

Supporting paragraphs: Piggy (song) The Downward Spiral
Answer: March 8, 1994