Northern Kings was a Finnish symphonic metal cover supergroup, made up of four well known musicians: Jarkko Ahola from Teräsbetoni, ex-Dreamtale, Marco Hietala from Nightwish and Tarot, Tony Kakko from Sonata Arctica and Juha-Pekka Leppäluoto from Charon and Harmaja.

Can we draw the following conclusion?
Four well known musicians were in Northern Kings.

Choose from: (I) Yes (II) It's impossible to say (III) No