No, Jack has a point, let us take a hypothetical example, christy moore say sings dirty old town, and does not mention that it was written about salford. or by MacColl.
and the promoter of the event has put in his publicity "an evening concert of irish songs with christy moore", the audience is then understandably misinformed and goes away thinking dirty old town is an irish song .
please note i am using this as a hypothetical example.