Question: Who is a sibling of the performer of Hold On (To My Love)?

full_context: Document 1: Hold the Line: ``Hold the Line ''is a song by the American rock band Toto. The song was written by the band's keyboardist David Paich, and the lead vocals were performed by Bobby Kimball. The song was released as the band's debut single, and was featured on their debut 1978 eponymous album. The song was a huge success in the U.S.; it reached Number 5 on the Billboard Hot 100 chart during the winter of 1978 -- 79, and Number 14 on the official UK chart.
Document 2: Holdin' Onto Somethin': "Holdin' Onto Somethin'" is a song written by Tom Shapiro and Thom McHugh, and recorded by American country music artist Jeff Carson. It was released in March 1996 as the fourth single from his debut album "Jeff Carson". The song reached number 6 on the "Billboard" Hot Country Singles & Tracks chart in June 1996. Before its release, it was the b-side to the album's third single, "The Car".
Document 3: Then Sings My Soul (album): Then Sings My Soul is a 2009 inspirational double CD album recorded by country music singer Ronnie Milsap. To date, it is his first and only gospel recording ever. It features several traditional hymns along with Christian-altered hit singles, including Milsap's "What a Difference You've Made in My Life" and Ben E. King's "Stand by Me". It was being marketed by an extensive TV mail order campaign.
Document 4: Be a Brother: Be a Brother is the third album by Big Brother and the Holding Company, released in 1970. It was their first album after Janis Joplin's departure. Recruited in her place were guitarist David Shallock and singer-songwriters Nick Gravenites and Kathi McDonald.
Document 5: Sunrise (Jimmy Ruffin album): Sunrise is an album by American soul singer Jimmy Ruffin, it was released in May 1980 and was produced by Robin Gibb (of the Bee Gees) and Blue Weaver. The songs were co-written by Gibb either with Weaver and/or his brothers. This album was released in US, Netherlands, UK, Norway and Germany. The lead single "Hold On (To My Love)" reached top ten in UK and US.
Document 6: Stand by Me (Ben E. King song): ``Stand by Me ''is a song originally performed by American singer - songwriter Ben E. King and written by King, Jerry Leiber, and Mike Stoller. According to King, the title is derived from, and was inspired by, a spiritual written by Sam Cooke and J.W. Alexander called`` Stand by Me Father,'' recorded by the Soul Stirrers with Johnnie Taylor singing lead. The third line of the second verse of the former work derives from Psalm 46: 2c / 3c.
Document 7: Mission to Please: Mission to Please is the 27th studio album by The Isley Brothers, released on May 14, 1996, on Island Records. It was a return to commercial glory for the group in the years following their platinum-certified album "Between the Sheets" (1983). Mission to Please also went platinum based on the strength of the charted singles "Let's Lay Together," a new duet with R. Kelly after the success of "Down Low (Nobody Has to Know)" (1995); the Babyface-composed ballad "Tears"; "Floatin' on Your Love," featuring Angela Winbush (Ronald Isley and she were married from 1993 to 2002); and the mid-'90s quiet-storm radio staple "Mission to Please You." Some of the album's success was due to Ronald Isley cultivating a new image as the character of "Mr. Biggs" in a series of R. Kelly videos, starting with "Down Low," helping to introduce the music of the Isley Brothers to a new generation of R&B fans. "Mission to Please" is the last Isley Brothers album to feature youngest brother Marvin Isley, who left the group in 1997 because of complications from diabetes; he died on June 6, 2010. "Mission to Please" also helped relaunch the Isley Brothers' label, T-Neck Records.
Document 8: Hold On (To My Love): "Hold On (To My Love)" is a song written by Robin Gibb and Blue Weaver and performed by American soul singer Jimmy Ruffin, released in 1980 on his album "Sunrise". It reached #10 in the US, #29 R&B and #7 in the UK.
Document 9: Hold On Hold Out: "Hold On Hold Out" is a song written and performed by American singer-songwriter Jackson Browne. It is from his 1980 album "Hold Out". It was released as the third single from the album, but due to its slightly over-eight-minute length, it was released as a "specially priced" 12" 45 rpm record (Asylum 11477) instead of the traditional 7", Asylum records possibly hoping to repeat the 12" airplay success of "The Load-Out/Stay" medley from the previous album. However, "Hold On Hold Out" only reached #103 on the "Billboard" Bubbling Under Hot 100 chart.
Document 10: Hold On (Tanya Blount song): "Hold On" is a song by American R&B singer Tanya Blount. It was the third single released from, "Natural Thing".
Document 11: I Am My Brother's Keeper: I Am My Brother's Keeper is a 1970 album by Motown vocalists and siblings Jimmy Ruffin and David Ruffin, credited as "The Ruffin Brothers". The album includes the singles "Stand by Me" and "When My Love Hand Comes Down".
Document 12: My Love (Lionel Richie song): "My Love" is the title of a 1983 hit song by the American singer-songwriter Lionel Richie. It was the third single released off Richie's self-titled debut solo album. The song features harmony backing vocals by country music singer Kenny Rogers. It reached the Top 10 on three notable "Billboard" magazine charts in the spring of 1983: on the pop chart, the song peaked at # 5; on the adult contemporary chart, the song spent four weeks at # 1; and on the R&B chart, the song topped out at # 6. "My Love" was not among Richie's more successful singles in the United Kingdom, where it only managed # 70 on the UK Singles Chart. In Canada in peaked on the RPM Singles chart at #28.
Document 13: Ben E. King: Benjamin Earl King (born Benjamin Earl Nelson, September 28, 1938 – April 30, 2015) was an American soul and R&B singer and record producer. He is best known as the singer and co-composer of "Stand by Me — a US Top 10 hit, both in 1961 and later in 1986 (when it was used as the theme to the film of the same name), a number one hit in the UK in 1987, and no. 25 on the RIAA's list of Songs of the Century — and as one of the principal lead singers of the R&B vocal group The Drifters, notably singing the lead vocals of one of their biggest global hit singles (and only U.S. #1 hit) "Save the Last Dance for Me".
Document 14: What Becomes of the Brokenhearted: ``What Becomes of the Brokenhearted ''is a hit single recorded by Jimmy Ruffin and released on Motown Records' Soul label in the summer of 1966. It is a ballad, with lead singer Jimmy Ruffin recalling the pain that befalls the brokenhearted, who had love that's now departed. The song essentially deals with the struggle to overcome sadness while seeking a new relationship after a breakup.
Document 15: Standing in the Shadows of Love: "Standing in the Shadows of Love" is a 1966 hit single recorded by the Four Tops for the Motown label. Written and produced by Motown's main production team Holland–Dozier–Holland, the song is one of the most well-known Motown tunes of the 1960s. A direct follow-up to the #1 hit "Reach Out I'll Be There" (even featuring a similar musical arrangement), "Standing in the Shadows of Love" reached #2 on the soul chart and #6 on the "Billboard" Hot 100 in 1967. It also reached #6 in the UK. Though the song was well-received, it has received some criticism. Author Martin Charles Strong notes that it rehashed the formula of "Reach Out I'll Be There" and achieved similar success by reaching the Top 10 in both the US and UK. It is ranked #470 on "Rolling Stone" 's list of The 500 Greatest Songs of All Time.
ground_truth: David Ruffin
sub_queries: Whose performance is Hold On (To My Love)? Answer: Jimmy Ruffin
Jimmy Ruffin >> sibling Answer: David Ruffin