Question:
Nilsson was born in Bedford-Stuyvesant, Brooklyn in 1941. His paternal grandparents were Swedish circus performers and dancers, especially known for their "aerial ballet" (which is the title of one of Nilsson's albums). His maternal grandparents were the cornerstone of his young life. While his grandmother played piano, his grandfather Charlie supported the family in a tiny railroad apartment on Jefferson St in Brooklyn.
Nilsson is the subject of a 2006 documentary, Who Is Harry Nilsson (And Why Is Everybody Talkin' About Him)? produced by David Leaf and John Schienfeld. The film was screened in 2006 at the Seattle International Film Festival and the Santa Barbara International Film Festival. In August 2006, the film received its Los Angeles premiere when it was screened at the 7th Annual Mods & Rockers Film Festival followed by a panel discussion about Nilsson featuring the filmmakers and two friends of Nilsson, producer Richard Perry and attorney/executive producer Lee Blackman. The filmmakers re-edited the film with rare found footage of Nilsson, further interviews, and family photographs, and finally released it on September 17, 2010 at selected theaters in the United States. A DVD, including additional footage not in the theatrical release, was released on October 26, 2010. Nilsson's final album, tentatively titled Papa's Got a Brown New Robe (produced by Mark Hudson) was not released, though several demos from the album were available on promotional CDs and online. The musical Everyday Rapture features three songs by Nilsson and, similarly, the film A Good Year features "Gotta get up", "Jump into the fire" and "How can I be sure of you". On July 29, 2013, Sony Music released a definitive box-set of his RCA era albums called The RCA Albums Collection. Each of the albums in the 17-CD set had additional bonus tracks, along with 3 of the 17 discs that contained rarities and outtakes spanning his entire career. Additionally, several weeks later on August 13, Flash Harry was finally issued on CD also featuring additional material. Completing the two CD releases, the first book written about Nilsson was published covering his life story.
Answer this question using a quote from the text above:

what was the documentary about?

Answer:

input: In the late 1980s, Jones and Gramm each put out solo efforts on Atlantic. Gramm released Ready or Not in January 1987 and shortly after its release, rehearsals for Foreigner's next album had started but ground to a halt as Lou's status with the group was uncertain. But after the promotion and concert dates for Lou's album were finished, cooler heads prevailed and Lou rejoined Foreigner in the studio for Inside Information, which was out at the end of 1987. Jones had Mick Jones in August 1989, then Gramm followed with his second solo release, Long Hard Look (October 1989), and decided to leave the group in May 1990 while preparing to tour behind Long Hard Look as the opener for Steve Miller Band. After finishing this tour, Gramm went on to form the short-lived band Shadow King, which put out one eponymous album on Atlantic in October 1991. Meanwhile, Jones brought in a new lead singer, Johnny Edwards (formerly of the bands Buster Brown, Montrose, King Kobra, Northrup and Wild Horses). Edwards made his first live appearance with Foreigner at the Long Island club Stephen Talkhouse on August 15, 1990, where he, Jones, Dennis Elliott and Rick Wills appeared, joined by special guests Terry Thomas (on guitar, who produced their next album) and Eddie Mack on harmonica. The new edition of Foreigner released the album Unusual Heat in June 1991. This was at the time their worst selling album and only climbed as high as No. 117 on the Billboard 200, although "Lowdown and Dirty" was a minor mainstream rock hit, reaching No. 4 on that chart. In July 1991, the new lineup of Foreigner played some European dates then made its official US debut on August 9 performing on the second night of a Billy Joel benefit concert at Deep Hollow Ranch in Montauk, New York to raise funds for the preservation of Montauk Point Lighthouse. For their 1991 tour, Jeff Jacobs, who had played in Joel's band, was brought in as the new keyboardist and Mark Rivera returned. But during the fall leg of this tour, Elliott decided to leave the group after a concert at The Ritz in NYC on November 14, 1991 and embark on a career as a wood sculptor. Larry Aberman was then recruited as a temporary replacement until Mark Schulman arrived in 1992 to hold down the drum throne for the next three years. Scott Gilman (guitar, sax, flute) joined the touring band in 1992 and Thom Gimbel took over from Gilman and Rivera in late 1992 after they departed. When Gimbel went to Aerosmith in 1993, Gilman returned to handle the guitar/sax/flute duties until Gimbel came back permanently in the spring of 1995.

Answer this question "Did he ever reunite with the band"
output: Jones brought in a new lead singer, Johnny Edwards

Answer the question at the end by quoting:

Lemon Henry "Blind Lemon" Jefferson (September 24, 1893 - December 19, 1929) was an American blues and gospel singer, songwriter, and musician. He was one of the most popular blues singers of the 1920s and has been called the "Father of the Texas Blues". Jefferson's performances were distinctive because of his high-pitched voice and the originality of his guitar playing. His recordings sold well, but he was not a strong influence on younger blues singers of his generation, who could not imitate him as easily as they could other commercially successful artists.
Jefferson was born blind (or possibly partially blind), near Coutchman, Texas. He was the youngest of seven (or possibly eight) children born to Alex and Clarissa Jefferson, who were sharecroppers. Disputes regarding the date of his birth derive from contradictory census records and draft registration records. By 1900, the family was farming southeast of Streetman, Texas, and his birth date is indicated as September 1893 in the 1900 census. The 1910 census, taken in May, before his birthday, further confirms his year of birth as 1893 and indicated that the family was farming northwest of Wortham, near his birthplace. In his 1917 draft registration, Jefferson gave his birth date as October 26, 1894, further stating that he then lived in Dallas, Texas, and had been blind since birth. In the 1920 census, he is recorded as having returned to Freestone County and was living with his half-brother, Kit Banks, on a farm between Wortham and Streetman. Jefferson began playing the guitar in his early teens and soon after he began performing at picnics and parties. He became a street musician, playing in East Texas towns in front of barbershops and on street corners. According to his cousin Alec Jefferson, quoted in the notes for Blind Lemon Jefferson, Classic Sides: They were rough. Men were hustling women and selling bootleg and Lemon was singing for them all night... he'd start singing about eight and go on until four in the morning... mostly it would be just him sitting there and playing and singing all night. In the early 1910s, Jefferson began traveling frequently to Dallas, where he met and played with the blues musician Lead Belly. Jefferson was one of the earliest and most prominent figures in the blues movement developing in the Deep Ellum section of Dallas. It is likely that he moved to Deep Ellum on a more permanent basis by 1917, where he met Aaron Thibeaux Walker, also known as T-Bone Walker. Jefferson taught Walker the basics of playing blues guitar in exchange for Walker's occasional services as a guide. By the early 1920s, Jefferson was earning enough money for his musical performances to support a wife and, possibly, a child. However, firm evidence of his marriage and children has not been found.

When did he start performing?
In the early 1910s,