Question: What instrument was the musician behind the album "In San Francisco" a famous exponent of?

Context articles: 1993 San Francisco Giants season
Eugene Schmitz
Abe Ruef
Notes from San Francisco
Marina Green
In San Francisco
Ali Akbar Moradi
Theresa Sparks
Mission Dolores mural
Ravi Shankar

The 1993 San Francisco Giants season was the Giants' 111th season in Major League Baseball, their 36th season in San Francisco since their move from New York following the 1957 season, and their 34th at Candlestick Park.
 In the offseason, Barry Bonds left the Pirates to sign a lucrative free agent contract worth a then-record $43.75 million over 6 years with the Giants, with whom his father spent the first 7 years of his career, and with whom his godfather Willie Mays played 22 of his 24 Major League seasons.
 The deal was at that time the largest in baseball history, in terms of both total value and average annual salary.
 To honor his father, Bonds switched his jersey number to 25 once he signed with the Giants, as it had been Bobby's number in San Francisco.
 (His number during most of his stay with the Pirates, 24, was retired in honor of Mays anyway).
 Bonds hit .336 in 1993, leading the league with 46 home runs and 123 RBI en route to his second consecutive MVP award, and third overall (of an eventual seven).
 As good as the Giants were (winning 103 games), the Atlanta Braves won 104 in what some call the last great pennant race (due to the Wild Card being instituted the following season).
 After going up by nine games August 11 with a 77-38 record, the Giants went 12-18 and found themselves three-and-a-half games behind, a 12.5-game swing, by September 15.
 They then went on a 14-2 run, which left them one game behind the Braves with one game remaining, which they lost 12-1 to become the only National League team to win 100 or more games (103) and not make the playoffs in the divisional play era.
Eugene Edward "Handsome Gene" Schmitz (August 22, 1864 in San Francisco, California – November 20, 1928 in San Francisco, California) was an American musician and politician, the 26th mayor of San Francisco (1902-7), who was in office during the 1906 San Francisco earthquake and became notorious for his conviction by a jury on charges of corruption.
Abraham Ruef (September 2, 1864 San Francisco, California – February 29, 1936 San Francisco), known as Abe Ruef, was an American lawyer and politician.
 He gained notoriety as the corrupt political boss behind the administration of Mayor Eugene Schmitz of San Francisco during the period before and after the 1906 San Francisco earthquake.
Notes from San Francisco is a posthumous album by Irish musician Rory Gallagher.
 Released in 2011, It consists of two CDs.
 The first disc is a never released album that Gallagher recorded in San Francisco in December 1977.
 The album was to be a major shift for Gallagher.
 Rather than producing it himself he worked with Elliot Mazer a successful producer who had a long track record with artists such as Bob Dylan, Janis Joplin, and The Band.
 At the last minute -- causing great distress to his manager and brother Donal and to his record company -- Gallagher decided to just pull the record.
 In an interview Gallagher stated "it wasn't because of the material or the musicians or anything like that.
 It was a song thing that I didn't think on the technical side everything worked.
 So I scrapped the thing" After scrapping the album Gallagher reworked his band firing all the musicians except the bass player and hiring a new drummer.
 This new Gallagher power trio re-recorded the San Francisco songs with Gallagher producing and released them as Photo-Finish.
 Shortly before his death, Rory reportedly gave Donal permission to eventually release the original San Francisco versions of the songs if they were remixed.
 Donal had his son Daniel remix the songs in 2011.
 The second disc is a live performance also recorded in San Francisco in December 1979.
The Marina Green in San Francisco, California, is a 74 acre expanse of grass between Fort Mason and the Presidio.
 It is adjacent to San Francisco Bay, and this location provides good views of the Golden Gate Bridge, Angel Island, Alcatraz Island, and parts of Marin County.
 Houses built mostly in the 1920s and 1930s line Marina Boulevard, the southern boundary of the Marina Green.
 Many of these houses have large bay windows, and Herb Caen, the late San Francisco newspaper columnist, often made references to the immaculate furnishings behind these windows.
 In the past, a railroad track along the southern edge of the Marina Green allowed the San Francisco Belt Railroad to serve the Presidio.
 Adjacent to the Marina Green is a marina, home to the St. Francis Yacht Club and the Golden Gate Yacht Club.
 The San Francisco Bay Trail runs through the green.
In San Francisco is a live album by Hindustani classical musician Ravi Shankar.
 It was released in 1967 on vinyl.
 It was later digitally remastered and released in CD format through Angel Records.
Ali Akbar Moradi (Kurdish ʿElî Ekber Muradî, عەلی ئەکبەر مورادی; born 1957) is a well known Kurdish musician and composer.
 He was born in Gahwareh, Kermanshah Province, Iran.
 He started music at a very early age, and learned the Kurdish "maqam" repertoire and tanbur (Kurdish lute) under the supervision of Kurdish masters such as Mirza Sayyed Ali Kafashyan, Kaki Allah Morad Hamidi and Sayyed Vali Hosseyni.
 He gave his first recital in 1971 in Kermanshah.
 In 1981, he began collaborating with the Kurdish singer Shahram Nazeri, and performed throughout Europe and North America.
 He is an expert on the tanbur instrument, which is considered sacred in Kurdish sufi music.
 He has performed music in New York, San Francisco and London.
 On September 30, 2006, he gives a special program as part of "Voices of Kurdistan" in San Francisco World Music Festival, he has been appointed as one of fifty of the best musicians around the globe by a British music magazine.
Theresa Sparks is the Executive Director of the San Francisco Human Rights Commission and was a candidate for San Francisco Supervisor for District 6 in the November 2010 election.
 She is a former president of the San Francisco Police Commission and former CEO of Good Vibrations.
 She is also one of San Francisco's most famous transgender women and was a Grand Marshal in the 2008 San Francisco Pride Parade.
The Mission Dolores mural is an 18th-century work of art in the Mission San Francisco de Asís, the oldest surviving structure in San Francisco.
 In 1791, the Ohlone people, Native Americans of the San Francisco Bay and laborers for the church, painted the mural on the focal wall of the sanctuary.
 Five years later, an altarpiece known as a reredos, was constructed in front of the mural, blocking it from view for more than two centuries.
 The mural remained mostly unseen in the intervening years, decaying slowly as it was protected from light and moisture behind the reredos enclosure.
Ravi Shankar, KBE (] ; 7 April 192011 December 2012), born Rabindra Shankar Chowdhury, his name often preceded by the title Pandit ('Master'), was a Bengali Indian musician and a composer of Hindustani classical music.
 He was one of the best-known exponents of the sitar in the second half of the 20th century and influenced many other musicians throughout the world.