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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 strip_annotations(graph):
 """Strip all the annotations from a BEL graph. :param pybel.BELGraph graph: A BEL graph """

    for u, v, k in graph.edges(keys=True):
        if ANNOTATIONS in graph[u][v][k]:
            del graph[u][v][k][ANNOTATIONS]