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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 candidate(cls):
 """The ``Candidate``."""

        return relationship(
            "Candidate",
            backref=backref(
                camel_to_under(cls.__name__) + "s",
                cascade="all, delete-orphan",
                cascade_backrefs=False,
            ),
            cascade_backrefs=False,
        )