def is_pronoun_function(self):
        return isinstance(self, DrtApplicationExpression) and \
               isinstance(self.function, DrtAbstractVariableExpression) and \
               self.function.variable.name == DrtTokens.PRONOUN and \
               isinstance(self.argument, DrtIndividualVariableExpression)
@param start_key: Opaque key of the first element to retrieve. Present in
dataset/ETHPy150Open nltk/nltk/nltk/sem/drt.py/DrtExpression.is_pronoun_function--crossover with--dataset/ETHPy150Open acil-bwh/SlicerCIP/Scripted/attic/PicasaSnap/gdata/contacts/client.py/ProfilesQuery.__init__