Question: Dom & Roland is the alias of British drum and bass producer Dominic Angas and has released records on several labels including 31 Records, Prototype, and Renegade Hardware, and has collaborated with many people including Amon Tobin, who has released how many major studio albums under the London-based Ninja Tune record label?
Sentence (from "Amon Tobin"): He has released seven major studio albums under the London-based Ninja Tune record label.
Relevant evidence: Yes