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.
Northern Kings contained members that all played with more than one band before joining.
The statement doesn't say that the musicians played with more than one band before forming the group therefore this could be true or could be false.
( z1 contain :ARG0 ( z2 organization :name ( z3 name :op "Northern" :op "Kings" ) ) :ARG1 ( z4 person :ARG0-of ( z5 have-org-role :ARG1 z2 :ARG2 ( z6 member ) ) :ARG0-of ( z7 play :accompanier ( z8 band :quant ( z9 more-than :op 1 ) ) :time ( z10 before :op ( z11 join :ARG1 z2 ) ) ) :mod ( z12 all ) ) )