Question: Seth Morgan was the fiancḗ of the rock singer who died at what age after a heroin overdose?

full_context: Document 1: Kozmic Blues: "Kozmic Blues" is a song from Janis Joplin's "I Got Dem Ol' Kozmic Blues Again Mama!" album, her first after departing Big Brother and the Holding Company. It was a part of Joplin's set at Woodstock Festival in 1969. Although the concert as a whole is not regarded as Joplin at her best, that specific performance became very popular and was released on "The Essential Janis Joplin".
Document 2: Seth Morgan (novelist): Seth David Morgan (April 4, 1949 - October 17, 1990) was an American novelist, who published one book, "Homeboy" (1990), and was working on a second novel when he died. He is also notable because he was Janis Joplin's fiancḗ at the time of her death, in October 1970.
Document 3: Janis (1975 album): Janis is a collection of performances by Janis Joplin, issued in 1975 as a compilation album containing film soundtrack and live recordings. Disc one is subtitled "From the soundtrack of the motion picture "Janis" (with substituted performances of 'Piece of my Heart' and 'Cry Baby')". In addition to concert recordings from Toronto and Frankfurt, there are several short TV-interviews. Disc two contains recordings from Austin, Texas (1963 and 1964), plus four recordings from San Francisco (1965). The album booklet contains a photo documentary, with 22 pictures from Janis Joplin's life and career.
Document 4: Neal Morgan, Jr.: Neal Morgan (born Lowell O’Neal Morgan, Jr.) was an author, columnist, college and high school football coach, Democratic political activist and academic administrator. Morgan published two books during his lifetime, "Play It from The Heart" (published Jun 1, 1999), and "Karankawa County: Short Stories from a Corner of Texas" (published Oct 1, 2001). Morgan spent 12 years contributing a weekly column on politics and life to "the Port Arthur News", a local newspaper in Port Arthur, Texas. Morgan had a long and manifold coaching career. After a four-year stint as head coach of the Bulldogs at Nederland High School (1972–75), Morgan coached at Howard College in Big Spring, Trinity University in San Antonio, and Sam Houston State University in Huntsville. His first head coaching assignment was at Old Lutcher Stark in Orange. During his time in Orange he gave Wade Phillips his first job in coaching by hiring him as his rookie defensive coordinator. When Morgan noticed the trend of the top athletes going to West Orange, he joined the coaching staff at The University of North Texas in Denton. Morgan has also published multiple articles in "The Texas Observer", and "Texas Monthly magazine".
Document 5: I Got Dem Ol' Kozmic Blues Again Mama!: I Got Dem Ol' Kozmic Blues Again Mama! is a 1969 studio album by Janis Joplin. It was the first solo studio album Joplin recorded after leaving her former band, Big Brother and the Holding Company, and the only one released in her lifetime ("Pearl" was released 3 months after Joplin's death).
Document 6: Janis Joplin: Janis Lyn Joplin ( ; January 19, 1943 – October 4, 1970) was an American rock singer and songwriter. She was one of the biggest female rock stars of her era. After releasing three albums, she died of a heroin overdose at age 27. A fourth album, "Pearl", was released in January 1971, just over three months after her death. It reached number one on the "Billboard" charts.
Document 7: Kip Morgan: Kipling Morgan, better known as Kip Morgan was a fictional character created by the bestselling author Louis L'Amour. Morgan is a detective, like the hard-boiled detective characters created by Dashiell Hammett and Raymond Chandler. In L'Amour's words, "Kip Morgan is an ex-prizefighter struggling to make a new career himself as a private operator." L'Amour wrote a few short stories featuring Morgan including "Dead Man's Trail", "With Death in His Corner" and "The Street of Lost Corpses". Several of the stories make up the latter third of Vol. 6 of "The Collected Short Stories of Louis L'Amour".
Document 8: Move Over!: Move Over! is an album by Janis Joplin released for Record Store Day 2011. The album contains unreleased, rare and alternate songs from all three of Joplin's backing bands, Big Brother and the Holding Company, Kozmic Blues Band and Full Tilt Boogie Band.
Document 9: Seth Morris: Seth Morris (born May 21, 1970) is an American actor, comedian, and writer known for his recurring roles on programs such as "Go On", "Happy Endings", "The Hotwives of Orlando", "Kroll Show", and "Childrens Hospital".
Document 10: 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.
Document 11: Seth Bogart: Seth Bogart is the second overall solo studio album written, recorded and performed by Hunx and His Punx vocalist Seth Bogart. It is the first studio album to be released under his name, as his previous solo record "Hairdresser" was issued under his stage name Hunx. Bogart had enjoyed making music as his Hunx character, but had wanted for a long time to start recording material that showed more of his true self, "like a weird teenager’s version of an adult album" as he said in an interview. Therefore, he decide to take more than two years to make the album, unlike during his Hunx period where he would make a record in five days or less. "Seth Bogart" was produced and co-written by Cole MGN, and also features vocal performances from Chela, Kathleen Hanna, Tavi Gevinson, Jeremiah Nadya and Clementine Creevy.
Document 12: Etta James: Etta James (born Jamesetta Hawkins; January 25, 1938 – January 20, 2012) was an American singer who performed in various genres, including blues, R&B, soul, rock and roll, jazz and gospel. Starting her career in 1954, she gained fame with hits such as "The Wallflower", "At Last", "Tell Mama", "Something's Got a Hold on Me", and "I'd Rather Go Blind". She faced a number of personal problems, including heroin addiction, severe physical abuse, and incarceration, before making a musical comeback in the late 1980s with the album "Seven Year Itch".
Document 13: Live at the Carousel Ballroom 1968: Live at the Carousel Ballroom 1968 is a live album by Big Brother and the Holding Company featuring Janis Joplin. The album was recorded by Owsley Stanley in 1968, and released on March 12, 2012, on the one-year anniversary of his death in an automobile accident. He had previously been supervising the development and release of this album right up to the time of his death on March 12, 2011. The album is dedicated to him, and set to the specifications Stanley set prior to his death.
Document 14: Morgan McDermott: Morgan McDermott is an American author best known for his short stories. His short story collection, "Owner's Manual", won the Ohio State University Prize in Short Fiction but remains unpublished. His short fiction has also appeared in many prominent journals and magazines including "The Nebraska Review", "The Mississippi Review", "The Bellingham Review", "Dogwood", "One Story", "Phoebe", "River City" and "New Millennium Writings". He has received awards for short fiction from Ruth Hindman Foundation and the Bridport Arts Centre. He won the Dana Award for the short story in 2002.
Document 15: Lee Morgan: Edward Lee Morgan (July 10, 1938 – February 19, 1972) was an American jazz trumpeter. Known mainly as one of the key hard bop musicians of the 1960s, Morgan came to prominence in his late teens, recording on John Coltrane's "Blue Train" (1957) and with the band of drummer Art Blakey before launching a solo career. Morgan stayed with Blakey until 1961 and started to record as leader soon after. His song "The Sidewinder", on the album of the same name, became a surprise crossover hit on the pop and R&B charts in 1964, while Morgan's recordings found him touching on other styles of music as his artistry matured. Soon after "The Sidewinder" was released, Morgan rejoined Blakey for a short period of time. After leaving Blakey for the final time, Morgan continued to work prolifically as both a leader and a sideman with the likes of Hank Mobley and Wayne Shorter, becoming, in the words of critic Steve Huey, "[a] cornerstone of the Blue Note label roster". Morgan's career was cut short at the age of 33, when his common-law wife shot and killed him following a confrontation at Slug's Saloon.
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