Question: Are both Chrissy Amphlett and Jimi Jamison songwriters?

full_context: Document 1: Burning Heart (song): "Burning Heart" is a song by Survivor. It was sung by Jimi Jamison and appeared in the 1985 film "Rocky IV" and on its soundtrack album. The single peaked at number 2 on the "Billboard" Hot 100 for two weeks in February 1986, behind "That's What Friends Are For" by Dionne and Friends.
Document 2: Jimmy Wayne: Jimmy Wayne Barber (born October 23, 1972) is an American country music singer and songwriter. He released his self-titled debut album in 2003 on the DreamWorks Records label. Four singles were released from it, including "Stay Gone" and "I Love You This Much", which both reached Top Ten on the "Billboard" country charts. A second album, "Do You Believe Me Now", was released in August 2008 via Big Machine Records subsidiary Valory Music Group, and its title track became his first Number One hit in late 2008. "Sara Smile" followed in 2009.
Document 3: Jim Morrison: James Douglas Morrison (December 8, 1943 – July 3, 1971) was an American singer, songwriter, and poet, best remembered as the lead singer of the Doors. Due to his poetic lyrics, distinctive voice, wild personality, performances, and the dramatic circumstances surrounding his life and early death, Morrison is regarded by both music critics and fans as one of the most iconic and influential frontmen in rock music history.
Document 4: Jimi Jamison: Jimmy Wayne "Jimi" Jamison (August 23, 1951 – September 1, 2014) was an American musician, singer, and songwriter. He had previously been the frontman of the platinum-selling rock band Survivor between 1984–89, 2000–06 and from 2011 until his death. Jamison is also known for writing and performing "I'm Always Here", the theme song for the TV series "Baywatch".
Document 5: Chrissy Amphlett: Christine Joy "Chrissy" Amphlett ( ; 25 October 1959 – 21 April 2013) was an Australian singer, songwriter and actress who was the frontwoman of the Australian rock band Divinyls.
Document 6: Chrissie Hynde: Christine Ellen "Chrissie" Hynde (born September 7, 1951) is an American musician who is best known as a founding member of the rock band The Pretenders.
Document 7: Divinyls: Divinyls (often incorrectly referred to as The Divinyls) was an Australian rock band that was formed in Sydney in 1980. The band primarily consisted of vocalist Chrissy Amphlett and guitarist Mark McEntee. Amphlett garnered widespread attention for performing on stage in a school uniform and fishnet stockings, and often used an illuminated neon tube as a prop for displaying aggression towards both band members and the audience.
Document 8: Jim Sullivan (singer-songwriter): James Anthony Sullivan (August 13, 1940 – disappeared March 6, 1975) was an American singer-songwriter and guitarist who released two albums before he disappeared without a trace in New Mexico.
Document 9: Jim Reeves: James Travis Reeves (August 20, 1923July 31, 1964) was an American country and popular music singer-songwriter. With records charting from the 1950s to the 1980s, he became well known as a practitioner of the Nashville sound (a mixture of older country-style music with elements of popular music). Known as "Gentleman Jim", his songs continued to chart for years after his death. Reeves died in the crash of his private airplane. He is a member of both the Country Music and Texas Country Music Halls of Fame.
Document 10: Jimmy Somerville: James William Somerville (born 22 June 1961) is a Scottish pop singer and songwriter. He sang in the 1980s with the pop groups Bronski Beat and The Communards, and has also had a solo career. He is known in particular for his falsetto singing voice.
Document 11: Vital Signs (Survivor album): Vital Signs is the fifth studio album by American rock band Survivor and their first with vocalist Jimi Jamison. The album was their second most successful in the U.S., reaching #16 on the Billboard Album charts and being certified platinum by the RIAA. This album includes the singles "I Can't Hold Back", "High on You", "The Search Is Over" and "First Night."
Document 12: Serial Thriller: "Serial Thriller" is a song written by Christina Amphlett and performed by Australian singer Brielle Davis. "Serial Thriller" is Davis's first charting CD single, debuting on the ARIA charts in July 2006 at number forty-four and number twenty-one on the ARIA Club, the song has a rock/beat influence which was a big contrast to her older material. Serial Thriller was written by Chrissy Amphlett from The Divinyls. This tear out release features remixes from mrTimothy, Moneyshott, Jimmy Z & Sam Gee, and Wayne G & Porl Young.
Document 13: Cris Williamson: Cris Williamson is an American feminist singer-songwriter, who achieved fame as a recording artist, and who was a pioneer as a visible lesbian political activist, during a time when few who were not connected to the Lesbian community were aware of Gay and Lesbian issues. Williamson's music and insight has served as a catalyst for change in the creation of women-owned record companies in the 1970s. Using her musical talents, networking with other lesbian artists of musical quality, and her willingness to represent those who did not yet feel safe in speaking for themselves, Williamson is remembered by many in the LGBT community for her contributions, both artistically, and politically, and continues to be a role model for a younger generation hoping to address concerns and obtain recognition for achievements specific to people who have historically been ignored.
Document 14: Cher: Cher ( ; born Cherilyn Sarkisian; May 20, 1946) is an American singer and actress. Sometimes referred to as the Goddess of Pop, she has been described as embodying female autonomy in a male-dominated industry. She is known for her distinctive contralto singing voice and for having worked in numerous areas of entertainment, as well as adopting a variety of styles and appearances during her five-decade-long career.
Document 15: Amanda Muggleton: Amanda Lillian Muggleton (born 1951) is an English Australian theatre, television and film actress. She is best known for her role as Chrissie Latham in the television soap opera "Prisoner" (1979–1983). Her stage work in Australia includes the title roles in "Shirley Valentine" and "Educating Rita", and as Maria Callas in "Master Class", for which she won the 2002 Helpmann Award for Best Actress in a Play. She won a second Helpmann Award in 2005, for her role as Mercedes Cortez in the musical "Eureka!".
ground_truth: yes