 
 <translate> To answer the above question, the relevant sentence is: A song about heroin addiction, it is considered a fan favourite, and is one of U2's most frequently performed songs in concert.
Therefore, the answer is heroin addiction. <ibo> Iji zaa ajụjụ a dị n'elu, ahịrịokwu dị mkpa bụ: Abụ banyere ị addictionụ ọgwụ ọjọọ, a na-ewere ya dịka ọkacha mmasị ndị na-akwado ya, ọ bụkwa otu n'ime abụ U2 a na-abụkarị na egwu. N'ihi ya, azịza ya bụ ịṅụ ọgwụ ike. 