Question: who got the best actress award in iifa 2018
[{'answer': 'Sridevi', 'provenance': [{'wikipedia_id': '3992562', 'title': 'IIFA Award for Best Actress', 'start_paragraph_id': 1, 'start_character': 356, 'end_paragraph_id': 1, 'end_character': 363, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]