Question: what is the airport code for abu dhabi
[{'answer': 'IATA : AUH'}, {'answer': 'ICAO : OMAA'}, {'provenance': [{'wikipedia_id': '487794', 'title': 'Abu Dhabi International Airport', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 131, 'bleu_score': 0.5859634641467331, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9807143661590231271}, 'section': 'Section::::Abstract.'}]}]