Premise: AC/DC are an Australian rock band , formed in 1973 by brothers Malcolm and Angus Young . Malcolm Mitchell Young ( born 6 January 1953 ) is an Australian retired musician and songwriter , best known as a co-founder , rhythm guitarist , backing vocalist and songwriter for the hard rock band AC/DC . Young took a leave of absence from AC/DC in April 2014 , to receive treatment for dementia .
Hypothesis: Malcolm Young was the co-founder of an Australian rock band.
Label: ENTAILMENT