Question: Were both Wong Ka Kui and Kyosuke Himuro a songwriter?

full_context: Document 1: Beyond (band): Beyond was a Hong Kong rock band that formed in 1983. The band became prominent in Hong Kong, Taiwan, Japan, Singapore, Malaysia, Mainland China and Overseas Chinese communities. The band is widely considered as the most successful and influential Cantonese music group from Hong Kong. In 1993, the founder of the group Wong Ka Kui died due to an accident while filming a show at Fuji Television in Tokyo. Beyond continued to perform and record after Wong Ka Kui's death. In 2005, the remaining members Paul Wong, Wong Ka Keung and Yip Sai Wing decided to pursue their own solo careers, and Beyond officially disbanded.
Document 2: Wong Ka Kui: Wong Ka-kui (10 June 1962 – 30 June 1993), was a Hong Kong musician, singer and songwriter, best known as the leader and co-founder of the rock band Beyond, for which he was the lead vocalist, rhythm guitarist and main songwriter. He won a lot of awards from 1988 onward. The band’s hit songs include "Loving You" (1988), "Truly Love You" (1989), "Amani" (1991), "Boundless Oceans, Vast Skies" (1993) etc.
Document 3: Boundless Oceans, Vast Skies: "Boundless Oceans, Vast Skies" (; lit. "sea wide sky empty") is a song performed by the Hong Kong rock band Beyond. Being released on 1993 in the Cantonese album "Rock and Roll", the song was massively popular. The song has been also translated as "Under a Vast Sky", "Ocean Wide Sky High", "Vast Seas, Clear Skies", and
Document 4: Kyo (musician): Kyo (京 , Kyō ) is a Japanese musician, poet and singer-songwriter. He is best known as the vocalist of the metal band Dir en grey. He has been with the band since its inception in 1997 and was formerly in La:Sadie's. Kyo was inspired to become a musician when he saw a picture of Buck-Tick vocalist Atsushi Sakurai on the desk of a junior high school classmate. His vocals span a tenor range.
Document 5: Rock and Roll (Beyond album): Rock and Roll (), is a 1993 album by Hong Kong rock band Beyond. This was the last album before the band's late vocalist, Wong Ka Kui died after an accident while filming in Japan.
Document 6: Yip Sai Wing: Yip Sai-wing (born 19 August 1963) is a Hong Kong musician, best known as the drummer and co-founder of the rock band Beyond, formed with the lead vocalist Wong Ka Kui.
Document 7: Anita Mui: Anita Mui Yim-fong (; 10 October 1963 – 30 December 2003) was a Hong Kong singer and actress making major contributions to the Cantopop music scene and receiving numerous awards and honours. She remained an idol throughout most of her career, and was generally regarded as a Cantopop diva.
Document 8: Toshi (musician): Toshimitsu Deyama (出山利三 , Deyama Toshimitsu , born October 10, 1965 in Tateyama, Chiba) , known exclusively by his stage name Toshi, is a Japanese singer and songwriter. He is best known as the lead vocalist and a co-founder of the heavy metal band X Japan, which disbanded in 1997. Toshi then went on to have an extensive solo career. In 2007, X Japan reunited and began an ongoing world tour in 2010. His distinctive, impassioned tenor vocals have been compared to those of Steve Perry.
Document 9: Boøwy: Boøwy (pronounced: bóui, stylized as BOØWY) was a Japanese rock band formed in Takasaki, Gunma in 1981. The best-known lineup of Kyosuke Himuro (vocals), Tomoyasu Hotei (guitar), Tsunematsu Matsui (bass) and Makoto Takahashi (drums) reached legendary status in Japan during the 1980s.
Document 10: Ryuichi Sakamoto: Ryuichi Sakamoto (坂本 龍一 , Sakamoto Ryūichi , born January 17, 1952) (] ) is a Japanese musician, composer, record producer, pianist, activist, writer, actor and dancer, based in Tokyo and New York. He began his career while a university student as a session musician, producer, and arranger in the 1970s, first gaining major success in 1978 as one third of the electronic music group Yellow Magic Orchestra (YMO). The band had worldwide hits such as "Computer Game / Firecracker" (1978), "Behind the Mask" (1978), and "Rydeen" (1979), playing a pioneering role in the development of the synthpop, techno and house genres.
Document 11: Kazutoshi Sakurai: Kazutoshi Sakurai (桜井 和寿 , Sakurai Kazutoshi , born 櫻井 和寿 , March 8, 1970 in Tokyo) is a Japanese musician. He composes and writes almost all of the songs for his band Mr. Children, in addition to writing lyrics and singing for his solo project group Bank Band. In 2006, Sakurai ranked #8 in HMV's "Top 30 Best Japanese Singers of All Time" and in 2007 was voted #4 as the "ideal father image" by Oricon. Also, in 2009, he was chosen as one of the Young Global Leaders in World Economic Forum. As an entrepreneur, he co-founded AP Bank, where he personally provided 1 million dollars of seed money to launch and fund the nonprofit lending group which finances environmentally friendly projects.
Document 12: Alan Tam: Alan Tam Wing-lun MH (; born 23 August 1950) is a Hong Kong singer and actor. He played a major role in developing the Cantopop scene in the 1980s as he was known for singing romantic ballads with modern arrangements. Today, he is still active in the music and film industry, releasing new albums on a regular basis. Since the late 1980s, he has served as a mentor for the cantopop music industry, earning the nickname the "Principal" or "Principal Tam". Today he is regularly seen across the media in Hong Kong, mainland China, Taiwan, and various parts of East Asia participating in all types of entertainment related events and charity activities. As of 2013, Alan Tam has launched total 115 solo albums and has sold over 35 million records worldwide, he is also holding the record for having the most concerts in Hong Kong as a solo artist.
Document 13: Flowers for Algernon (album): Flowers for Algernon is the first solo album by Japanese singer Kyosuke Himuro. Japanese rock group Boøwy, to which he once belonged, disbanded and this album was released as his solo debut five months later.
Document 14: Kyosuke Himuro: Kyosuke Himuro (氷室 京介 , Himuro Kyōsuke , born October 7, 1960 in Takasaki, Gunma, Japan) is a Japanese singer-songwriter and musician. He was a lead vocalist of the rock band Boøwy from 1981 to 1988. After the group disbanded he started a successful solo career, becoming one of Japan's best-selling artists. In 2003, HMV Japan ranked Himuro at number 76 on their list of the 100 most important Japanese pop acts. He currently lives in Los Angeles, California, where he purchased a palatial residence in Beverly Hills in 2004, which was previously owned by Shaquille O'Neal.
Document 15: Wong Ka Keung: Wong Ka-keung (born 13 November 1964), also known as Steve Wong, is a Hong Kong musician, singer and songwriter. He is best known as bassist for the rock band Beyond, of which his elder brother Wong Ka Kui is the lead vocalist.
ground_truth: yes