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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 task(self) -> Tuple[str, Any]: """Return the scenario's task configuration as a tuple. :raises MultipleTaskDefinitions: if there is more than one task config under the 'scenario' key. """

        try:
            items, = self.configuration.items()
        except ValueError:
            raise MultipleTaskDefinitions(
                'Multiple tasks defined in scenario configuration!',
            )
        return items