Question: Which musician, Mikael Åkerfeldt or Dave Pirner, is best known as the lead vocalist and frontman for the alternative rock band Soul Asylum? 
Sentence (from "Dave Pirner"): David Anthony "Dave" Pirner (born April 16, 1964) is an American songwriter, singer, and producer best known as the lead vocalist and frontman for the alternative rock band Soul Asylum.
Relevant evidence: Yes