Question: Who, Mark Morriss and Jonne Järvelä, is the vocalist/guitarist of the Finnish band Korpiklaani?
Sentence (from "Jonne Järvelä"): In 2011 he appeared in the song "Humppa Is My Neighbour" by the Russian band Troll Bends Fir and in the song "Leszek a Hold" by the Hungarian band Dalriada, in 2012 he played on the Varg Song "A Thousand Eyes" of the Guten Tag album.
Relevant evidence: No