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In page Joke:

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The narrative always contains a protagonist who becomes the "butt" or target of the joke.[citation needed] This labelling serves to develop and solidify stereotypes within the culture. It also enables researchers to group and analyse the creation, persistence and interpretation of joke cycles around a certain character. Some people are naturally better performers than others; however, anyone can tell a joke because the comic trigger is contained in the narrative text and punchline. A joke poorly told is still funny, unless errors or omissions make the intended relationship between the narrative and the punchline unintelligible.