Claim: Kerplunk was released through online sale only.
Evidence: Kerplunk is the second studio album by American punk rock band Green Day , released on December 17 , 1991 by Lookout !	Green Day	Green Day	Lookout	Lookout Records	punk rock	punk rock
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Records was an independent record label , initially based in Laytonville , California and later in Berkeley , focusing on punk rock.