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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 is_mention_line(cls, word):
 """ Detects links and mentions :param word: Token to be evaluated """

        if word.startswith('@'):
            return True
        elif word.startswith('http://'):
            return True
        elif word.startswith('https://'):
            return True
        else:
            return False