Question: How many albums has the artist who released his second studio album on October 15, 1987 sold?
Sentence (from "Joe Satriani"): 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.
Relevant evidence: No