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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 get_annotation_values(graph, annotation: str) -> Set[str]: """Get all values for the given annotation. :param pybel.BELGraph graph: A BEL graph :param annotation: The annotation to summarize :return: A set of all annotation values """

    return set(iter_annotation_values(graph, annotation))