Question: How many albums has the artist who released his second studio album on October 15, 1987 sold?

<P0-S0> Surfing with the Alien is the second studio album by American rock guitarist Joe Satriani. <P0-S1>  It was released on October 15, 1987, by Relativity Records. <P0-S2>  The album is one of Satriani's most successful to date and helped establish his reputation as a respected rock guitarist. <SEP> <P1-S0> Puerto Rican recording artist Ricky Martin has released ten studio albums, eight compilation albums, two live albums, one soundtrack album and four box sets. <P1-S1>  As of April 2013, the singer has sold over 70 million albums worldwide. <P1-S2>  Martin's self-titled debut studio album was released in November 1991 by Sony Discos. <P1-S3>  Two years later, Columbia Records released Martin's second studio album, "Me Amarás". <P1-S4>  Despite both albums failing to achieve a significant commercial success, they pushed Martin towards superstar status in many Latin American countries. <P1-S5>  His third studio album, "A Medio Vivir", was released in September 1995 by Sony Latin. <P1-S6>  The album features a "harder rock edge style" than his previous efforts, while being mixed with Latin references such as flamenco and cumbia. <P1-S7>  "A Medio Vivir" charted in several countries and peaked at number seven in Spain and number 11 on the US Latin Albums chart. <SEP> <P2-S0>  During his career he has sold over one million albums (12 Gold and Platinum), recorded thirty-two #1 hit songs and eight Number 1 albums, earned six Silver, Gold and Platinum Tickets, won 10 Quebec Felix Music Awards, six Socan awards and four Juno nominations, and performed in Canada and Europe in the hit stage musicals "Notre Dame De Paris" and "Dracula". <P2-S1> Sylvain Cossette (born May 8, 1963) is a French-Canadian singer-songwriter from Grand-Mère, Quebec (located in the Mauricie region). <P2-S2>  A new trilogy project (album/photobiography book/tour) called ACCORDS was released in October 2014 and spawned three Number 1 hit singles followed by a tour throughout French Canada in 2015. <P2-S3>  In 2017 he released his first instrumental album Café et Guitares in over 200 countries. <P2-S4>  Sylvain was a founding member of the Quebec-based English language band Paradox in 1984, before becoming a French language solo artist by 1994. <P2-S5>  The 70s concert tour went Silver Ticket (25,000 tickets sold) in three months and Gold Ticket (50,000 tickets sold) within a year. <P2-S6>  In September 2011 he launched his new one-year tour «The Best of the 70s». <P2-S7>  His 2007 album "70s" (#1 Quebec, #2 Canada) is his first all English release and produced four Number 1 hit singles and two Number 1 hit videos. <P2-S8>  In April 2014 he released an album "Les numérous 1" of his career #1 hit songs that he composed. <P2-S9>  In 2014-16 he was the creative force behind two children projects (albums and live shows): Lily et le Lutin & Pyjama Party. <P2-S10>  On October 1, 2012, he release his first original French language album in 12 years called "Le jour d'après" (4 number one hit songs) which he wrote, co-arranged and co-produced. <P2-S11>  On October 21, 2008, he released the album "70s Volume 2" and produced three Number 1 hit singles and one Number 1 hit video. <P2-S12>  The album went Gold (50,000 CDs sold) in 27 days and Platinum (100,000 CDs sold) in 15 weeks. <P2-S13>  In October 2011, two compilation albums were released of his greatest French language hits. <P2-S14>  On October 25, 2010, the album 70s Volume 3 was released and quickly went Gold. <SEP> <P3-S0> Joseph Satriani (born July 15, 1956) is an American instrumental rock guitarist and multi-instrumentalist. <P3-S1>  Early in his career, Satriani worked as a guitar instructor, with many of his former students achieving fame, such as Steve Vai, Larry LaLonde, Rick Hunolt, Kirk Hammett, Andy Timmons, Charlie Hunter, Kevin Cadogan, and Alex Skolnick; he then went on to have a successful solo music career. <P3-S2>  He is a 15-time Grammy Award nominee and has sold over 10 million albums, making him the biggest-selling instrumental rock guitarist of all time.