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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 make_example_graphs():
    "Make graphs from all the examples in cag_examples."
    cag_example_rdfs = {}
    for i, fname in enumerate(os.listdir('cag_examples')):
        cag_example_rdfs[i+1] = get_example_extractions(fname)
    return make_cag_graphs(cag_example_rdfs)