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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def participate(self, identity, experiment_name, variant):
 """ Set the variant for a specific user and mark a participation for the experiment. Participation will *only* be marked for visitors who have been verified as humans (to avoid skewing reports with requests from bots and web crawlers). """

        self.set_variant(identity, experiment_name, variant)
        if self.is_verified_human(identity):
            self.mark_participant(experiment_name, variant)