Question: Which American singer-songwriter has released albums entitled "Ratchet" and "Hope"?

Context paragraphs:
Hope (Shamir album): Hope is the second studio album by American singer-songwriter Shamir, self-released on SoundCloud on April 17, 2017.

Tiga (musician): Tiga James Sontag (born 1974) is a Canadian musician, DJ and record producer of electronic dance music.  Tiga has released three albums entitled "Sexor", "Ciao! ", and "No Fantasy Required".  "Sexor" won the 2007 Juno Award for Dance Recording of the Year.  Tiga released a selection of compilations in the early 2000s, featuring mixes such as "American Gigolo", "" and, "Mixed Emotions", which put him on the map as one of "the world's best mixers".  His most recent compilation mix, "Tiga Non-Stop", was released in November 2012, and premiered Tiga's latest single "Plush."  The mix also features tracks from artists such as Kindness, Duke Dumont and Blawan.

Shamir (musician): Shamir Bailey (born November 7, 1994), known mononymously as Shamir, is an American singer and songwriter from Las Vegas, Nevada.  His debut extended play (EP), "Northtown", was released in June 2014 to positive reviews.  In October 2014 he signed to XL Recordings and released the single "On the Regular".  His debut LP "Ratchet" was released on May 19, 2015 in the United States.

Gary Lux: Gerhard "Gary" Lux (born 26 January 1959) is an Austrian singer, most famous for having represented his country in the Eurovision Song Contest on six occasions.  He was born in Ontario, Canada but returned to live in Austria with his parents as a young boy.  He was married to Marianne (died of cancer on April 4th 2011) and has 2 sons, Benny and Dennis.  He has released solo albums entitled "Dreidimensional" and "City of Angels" inspired by some time he had spent in Los Angeles.

Doping Panda: Doping Panda is a Japanese rock group.  They are part of Sony Music Japan's gr8 records!  division, which includes bands such as Orange Range, Uverworld and Boom Boom Satellites.  They released their first album "Performation" in 2001, and a second "WE IN MUSIC" in 2004.  In 2005, Doping Panda released two albums entitled "High Fidelity", and "High Pressure".  After being received very well by the Japanese Rock scene, the group went on a series of tours throughout the country, releasing their 2006 album "Dandyism", along with the hit singles "Miracle" and "Can't Stop Me".  Their success solidified their status as an icon in the Japanese music scene and increased their fanbase throughout Asia.

Safe House Records: Safe House Records was an indie rock record label based in West Lebanon, New Hampshire.  It was founded by Ken Katkin, who had previously worked at Homestead Records.  Its president was James "Jim" Reynolds.  They released a series of Led Zeppelin tribute albums entitled "The Song Retains the Name", a reference to the Led Zeppelin song "The Song Remains the Same".  The first of these albums was released in 1988, and the second in 1993.

The Ongoing Concept: The Ongoing Concept is a Rock band from Rathdrum, Idaho made up of three brothers and their childhood friend that started in 2009.  They released an independent EP in 2010 entitled "What Is My Destiny", an independent EP in 2011 entitled "Arrows Before Bullets" and two studio albums entitled "Saloon" (2013) and "Handmade" (2015) through their label Solid State Records.

Zico Chain: Zico Chain are a rock band from London, United Kingdom, formed in 2002.  To date, they have released two full albums entitled "Food" and "The Devil in Your Heart", a self-titled EP and an EP called "These Birds Will Kill Us All".  The band opened the main stage at the Download Festival on 8 June 2007.  They supported Velvet Revolver on their 2007 summer tour of the UK, in support of their second album "Libertad".  Their new album "The Devil in Your Heart" was released on 16 April 2012.

Bu Laia: Bu Laʻia (born as Shawn Kaui Hill in Waimanalo, Hawaii) is a Hawaiian comedian known for his use of Hawaiian pidgin and for wearing a large "afro style" wig and blacking out one of his front teeth while performing.  He starred in a cable television show in the early 1990s and released two comic musical albums entitled "False Crack???"  and "Hawaii's Most Wanted."  He also attained fame—or notoriety—when he ran for governor of Hawaiʻi in 1994 (when he was too young to legally do so) and again as a member of the Natural Law Party in 2002.  He also attracted attention when he was arrested for riding a skateboard at Honolulu International Airport.  Bu is pidgin for "Bull".  The name "Bu Laʻia" is a homophone of "Bull Liar", a phrase meaning "an outrageous liar".  His name is reminiscent of the character created by Hawaiian comedian Kent Bowman, “K.K. Kaumanua” (K.K. Cow–Manure) famous for his "Pidgin English Children's Stories," although Bowman's character uses the pidgin English of an earlier generation.

...A Peaceful Riot...: Beatrock Presents: FATGUMS X BAMBU ...A Peaceful Riot... is the debut EP by underground hip hop duo Fatgums & Bambu, released on April 25, 2009.  Prior to the release, the duo's rapper Bambu had released three solo albums entitled "Self Untitled...", "...I Scream Bars for the Children...", and "...Exact Change...", and one album entitled "Barrel Men" as a member of the group Native Guns.

Supporting paragraphs: Hope (Shamir album) Shamir (musician)
Answer: Shamir