Question: who get rajiv gandhi khel ratna award 2018
[{'answer': 'Weightlifter Saikhom Mirabai Chanu', 'provenance': [{'wikipedia_id': '2552139', 'title': 'Rajiv Gandhi Khel Ratna', 'start_paragraph_id': 3, 'start_character': 682, 'end_paragraph_id': 3, 'end_character': 716, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Cricketer Virat Kohli', 'provenance': [{'wikipedia_id': '2552139', 'title': 'Rajiv Gandhi Khel Ratna', 'start_paragraph_id': 3, 'start_character': 721, 'end_paragraph_id': 3, 'end_character': 742, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2552139', 'title': 'Rajiv Gandhi Khel Ratna', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 742, 'bleu_score': 0.8514778020661851, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 425188221795944613}, 'section': 'Section::::Abstract.'}]}]