Question: When was the frontman of Anal Cunt died?

full_context: Document 1: 40 More Reasons to Hate Us: 40 More Reasons to Hate Us is the third album by Anal Cunt, recorded after their Japanese Tour in June 1995 and released on March 26, 1996, by Earache Records. The name of the album reflected the notoriety that the band had achieved due to their controversial song titles and lyrics.
Document 2: Death Grips discography: American band Death Grips has released six studio albums, one compilation album, three extended plays (EPs), one mixtape, seven singles, eight promotional singles, three remixes, and 42 music videos. The band was formed by MC Ride, Zach Hill, and Andy "Flatlander" Morin in Sacramento during the winter of 2010. In March 2011, they released their eponymous debut EP. The mixtape "Exmilitary" followed a month later and was praised by contemporary music critics. Death Grips signed a record deal with Epic Records in early 2012 and their debut studio album "The Money Store" was released in April to critical acclaim, peaking at number 130 on the "Billboard" 200 chart. Because Epic Records would not confirm a release date for their second studio album "No Love Deep Web" before 2013, Death Grips self-released the album in November 2012. As a result of this and the ensuing conflict between the band and the record label, Death Grips was dropped by Epic Records. "No Love Deep Web" received positive reviews and peaked at number 2 on the "Billboard" Heatseekers chart.
Document 3: Picnic of Love: Picnic of Love is the fifth album by Anal Cunt. It was released on July 21, 1998. The album was released as a joke and a parody of love songs, as well as of the band itself. The album is characterized by the opposite of everything that the band represents. While the normal Anal Cunt album consists of forty to fifty tracks (most which are under a minute in length), "Picnic of Love" contains only eleven comparably long tracks. The extreme metal distorted guitars, rapid-fire drumming and loud screaming of earlier Anal Cunt songs is replaced by soft acoustic guitar and vocalist Putnam singing in gentle falsetto. The most apparent change is the lyrical content: all of the songs are about inoffensive, sweet subjects as opposed to the band's more typical deliberately offensive or provocative material.
Document 4: Seth Putnam: Seth Edward Putnam (May 15, 1968 – June 11, 2011) was an American musician who was the founder of grindcore band Anal Cunt. He was known for his brutal screaming and lyrics that either shock, offend, or invoke morbid humor. Throughout his career, Putnam had been involved in many side projects, including backing vocals on Pantera's "The Great Southern Trendkill."
Document 5: Death (metal band): Death was an American death metal band from Orlando, Florida, founded in 1983 by guitarist and vocalist Chuck Schuldiner. Death is considered to be one of the most influential bands in heavy metal and a pioneering force in death metal. Its debut album, "Scream Bloody Gore", has been widely regarded as the first death metal record, while the band's driving force, Chuck Schuldiner, is acknowledged as the originator of extreme metal. Death had a revolving lineup, with Schuldiner being the sole consistent member. The group's style also progressed, from the raw sound on its early albums to a more sophisticated one in its later stage. The band ceased to exist after Schuldiner died of glioma and pneumonia in December 2001, but remains an enduring metal band.
Document 6: Everyone Should Be Killed: Everyone Should Be Killed is the debut full-length studio album by American grindcore band Anal Cunt, released by Earache Records on May 24, 1994.
Document 7: Anal Cunt discography: Anal Cunt was an American grindcore band from Newton, Massachusetts. Formed in 1988, the band released eight studio albums, one live album, five compilation albums, eleven extended plays (EPs) and eight split EPs. Anal Cunt disbanded in 2011 due to the death of frontman Seth Putnam.
Document 8: Kent Stax: Kent Stax is the original and current drummer of the DC hardcore punk band Scream, considered, with perhaps the exception of Minor Threat (both of these bands recorded on the now famous underground Dischord Records label), one of the most influential and successful hardcore punk band to emerge from the music movement which thrived during the 1980s. Along with brothers Franz and Peter Stahl and bassist Skeeter Thompson, Stax helped create the lightning-fast tempo that was a trademark of the punk rock genre. Considered one of the fastest and most energetic drummers in the field at that time, his talents lent themselves to keeping a thrashing powerful musical force under control, giving Scream its homegrown reputation as pioneers in the genre which transcended into some international notoriety. In the late eighties Stax left the band for personal reasons and David Grohl, a local drummer who was working with local band Dain Bramage replaced the longtime drummer. Stax played drums in a series of bands throughout the 1990s that drew influence from English punk and Oi music, most notably The Suspects (a band that had many muttering about a DC hardcore revival not seen since 1983) United 121 and Spitfires United. In the 2000s he played drums in the DC Oi-core band Alleged Bricks.
Document 9: Fuckin' A: Fuckin' A is the eighth and final full-length album by the grindcore band Anal Cunt. It was released digitally on August 10, 2010, and then physically on January 11, 2011. The album is intended to be a parody of "cock rock" bands such as Mötley Crüe and Buckcherry and its cover uses the same image as Mötley Crüe's debut album "Too Fast for Love". Some versions of the CD cover had the umlaut in "Anal" moved to the N, and a completely different font for the album title.
Document 10: Old Stuff – Part 3: Old Stuff, Part 3 is a compilation album by grindcore band Anal Cunt. The album contains a demo recorded for a Boston hardcore compilation that was never released (most of these songs were later rerecorded for the album "I Like It When You Die"). It also contains songs from The Raunchous Brothers split 7", songs from various tribute compilations, and other previously unreleased songs. It was released on CD on July 24, 2008, and on LP in April 2009. The LP comes with an exclusive poster. All songs on this album were recorded in the late 1990s.
Document 11: Annetenna: Annetenna was a short-lived band that emerged from the ashes of Ednaswap. On formation, the band were immediately signed by Columbia Records and recorded a self-titled album, which was then shelved by the record label. Founding members Anne Preven and Scott Cutler continue to write and produce songs for other artists, but the Annetenna project seems to have been put to rest.
Document 12: Chuck Schuldiner: Charles Michael Schuldiner (May 13, 1967 – December 13, 2001) was an American singer, songwriter, and guitarist. He founded the pioneering band Death in 1983. Schuldiner is often referred to as "The Godfather of Death metal",
Document 13: Anal Cunt: Anal Cunt, also known as AxCx and A.C., was an American grindcore band that formed in Newton, Massachusetts in 1988. Since its inception, the band underwent a number of line-up changes. Known for its grindcore musical style and controversial lyrics, Anal Cunt released eight full-length studio albums in addition to a number of compilations and extended plays. Anal Cunt disbanded in 2011 after the group's founder and frontman, Seth Putnam, died of a suspected heart attack.
Document 14: Grindcore: Grindcore is an extreme genre of music that originated in the early to mid-1980s. It draws inspiration from some of the most abrasive-sounding genres, including hardcore punk, extreme metal, industrial and noise rock. Grindcore is characterized by a noise-filled sound that uses heavily distorted, down-tuned guitars, grinding overdriven bass, high speed tempo, blast beats, and vocals which consist of growls and high-pitched shrieks. Early groups like Napalm Death are credited with laying the groundwork for the style. It is most prevalent today in North America and Europe, with popular contributors such as Brutal Truth and Nasum. Lyrical themes range from a primary focus on social and political concerns, to gory subject matter and black humor.
Document 15: Seth Kimbrough: Seth Kimbrough is a professional BMX rider, most notable for being the vocalist for Mortal Treason until the band's break-up in 2005. He also formed Misery Chastain, a year after Mortal Treason's break-up.
ground_truth: June 11, 2011