Question: which indian awarded goldman environmental prize in april 2017
[{'answer': 'Prafulla Samantara', 'provenance': [{'wikipedia_id': '606601', 'title': 'Goldman Environmental Prize', 'start_paragraph_id': 202, 'start_character': 12, 'end_paragraph_id': 202, 'end_character': 30, 'bleu_score': 1.0, 'section': 'Section::::Prize winners.:2017.\n'}]}]