Question: Which member of Thenewno2 debuted as a professional musician assisting in recording his father's final album after his father's death?
Sentence (from "Thenewno2"): Thenewno2 (styled as thenewno2) are an alternative rock band from London, originally composed of Dhani Harrison and Oliver Hecks, with Harrison playing lead guitar and singing lead vocals, and Hecks playing drums and synthesizer.
Relevant evidence: Yes