Task: Explanation
Input (English): Joseph Satriani (born July 15, 1956) is an American instrumental rock guitarist and multi-instrumentalist. 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. 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. Question: How many albums has the artist who released his second studio album on October 15, 1987 sold? Answer: over 10 million
Output (English):  He is a 15time Grammy Award nominee and has sold over 10 million albums, making him the biggestselling instrumental rock guitarist of all time.