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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 map_ontologies():
 """Run ontology mapping on a list of INDRA Statements."""

    if request.method == 'OPTIONS':
        return {}
    response = request.body.read().decode('utf-8')
    body = json.loads(response)
    stmts_json = body.get('statements')
    stmts = stmts_from_json(stmts_json)
    om = OntologyMapper(stmts, wm_ontomap, scored=True, symmetric=False)
    om.map_statements()
    return _return_stmts(stmts)