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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 satisfier(self, term):
 # type: (Term) -> Assignment """ Returns the first Assignment in this solution such that the sublist of assignments up to and including that entry collectively satisfies term. """

        assigned_term = None  # type: Term

        for assignment in self._assignments:
            if assignment.dependency.name != term.dependency.name:
                continue

            if (
                not assignment.dependency.is_root
                and not assignment.dependency.name == term.dependency.name
            ):
                if not assignment.is_positive():
                    continue

                assert not term.is_positive()

                return assignment

            if assigned_term is None:
                assigned_term = assignment
            else:
                assigned_term = assigned_term.intersect(assignment)

            # As soon as we have enough assignments to satisfy term, return them.
            if assigned_term.satisfies(term):
                return assignment

        raise RuntimeError("[BUG] {} is not satisfied.".format(term))