Question: At what age did the artist, whose ninth studio album was title Sentimento, go blind?
Context: Different Things is the ninth studio album by American country music artist Tracy Byrd.  It was released in 2006 on Byrd's own Blind Mule label.  The songs "Cheapest Motel" and "Better Places Than This" were released as singles.  The former reached a peak of #55 on the Hot Country Songs charts in 2006. "Sacred Worlds" is the first track from German power metal Blind Guardian's ninth studio album At the Edge of Time.  At 9:17 minutes it is the longest track on the album.  An edited version of the original song 'Sacred,' with a new orchestral intro and outro, was used.  It was written by Blind Guardian for the video game . Women Hold Up Half the Sky is the solo debut studio album by Ruby Turner, released in 1986 by Jive Records.  It includes a cover version of the Staple Singers song, "If You're Ready (Come Go With Me)", a duet with Jonathan Butler, and the Etta James standard "I'd Rather Go Blind". At the Edge of Time is the ninth studio album by the German heavy metal band Blind Guardian.  A two CD version of the album was released, with the second disc containing 8 tracks.  The artwork for the album was created by Colombian artist Felipe Machado Franco.  The album was released in Europe on July 30, 2010.  A music video for "A Voice in the Dark" was released on August 3, 2010. Something for the Rest of Us is the ninth studio album by American rock band Goo Goo Dolls.  It was released on August 28, 2010 in Australia and on August 31 in North America through Warner Bros.  Records.  The recording process took place during the spring to fall of 2009 in the GCR Audio studio in Buffalo and Paramount Studios as well as "the Ark" in Los Angeles, with producer Tim Palmer.  A single had been originally slated to be released in November 2009 with an album release in February 2010, but the band went back into the studio in January 2010.  According to lead singer and guitarist John Rzeznik, this was done to make further improvements on what they had previously thought had been a finished record.  Several producers were brought in to assist on the production process, including Butch Vig, John Fields, Paul David Hager and Rob Cavallo.  "Something for the Rest of Us" is the third Goo Goo Dolls studio album that Cavallo has produced ("Dizzy Up the Girl" and "Gutterflower").  When asked about the length of time between albums, Rzeznik admitted it was a mix of songwriting issues as well as taking time out for personal reasons; "I wanted to really dig deep and there are a million songs I threw away, like, “Nah, it's not good enough.  I wanna do something different.  I wanna do something better, go deeper.  I also wanted to have a life with my girlfriend for a while.  I owed it to her to spend some time with her and be normal and be in one place.  That was kind of important."  In one of the Ustream sessions, Robby revealed that the album would have twelve songs and "Real" is not among them.  In late May, John announced that "Home" would be the first single and was released onto radio and iTunes stores on June 8, 2010. Story of My Life is Pere Ubu's ninth studio album.  Eric Drew Feldman left the band prior to recording, reducing Ubu to a quartet.  Prior to touring on this album Tony Maimone left as well.  According to a conversation between David Thomas and Frank Black included on the b-side of the "Kathleen" single, the album's working title was "Johnny Rivers Live At The Whiskey A Go Go". Sentimento is the ninth studio album released by Andrea Bocelli.  It was recorded between 30 September and 7 October 2002, and released on 5 November 2002. The Celibate Rifles are an Australian punk rock band which formed in 1979 with a line-up that included mainstays Dave Morris on rhythm guitar and Kent Steedman on lead guitar, within a year they were joined by Damien Lovelock on lead vocals.  They released their first album, "Sideroxylon", in April 1983 on the Hot Records label.  The band has toured both America and Europe extensively, and released their ninth studio album, "Beyond Respect" on 19 July 2004.  In 1985 the group's style was described as post-Radio Birdman sound which is "a combination of fast, guitar-driven, hard rock and power pop".  In November 1987 "Sounds" magazine's Roger Holland described their album, "Roman Beach Party" as showing the group's "sawn off rock potential all the way down to the bleached white of the bone, the lyrics reveal all the anger, insight and humour that makes [them] one of the most powerful rock bands in the world today".  In April 1994 The Celibate Rifles issued "Spaceman in a Satin Suit" which according to Australian rock music historian, Ian McFarlane "was [their] best studio album since "Blind Ear"".  Lovelock has undertaken a solo career and issued two albums as well as becoming a TV sports presenter. Andrea Bocelli, (] ; born 22 September 1958) is an Italian classical crossover tenor, recording artist, and singer-songwriter.  Born with poor eyesight, Bocelli became completely blind at the age of 12, following a football accident. Let It Go is the ninth studio album by Tim McGraw.  Released on March 27, 2007, it was his first studio album in two and a half years.  "Let It Go" entered the U.S. "Billboard" 200 at number one with sales of 325,000.  The album has produced seven Top 20 singles on the "Billboard" Hot Country Songs charts, including a number one; one of those seven songs was only included on later issues of the album.  Of all McGraw's albums, this one has produced the most singles in his career.
Answer: 12