Question: who laid the foundation of sardar sarovar dam
[{'answer': 'Prime Minister Jawaharlal Nehru', 'provenance': [{'wikipedia_id': '623549', 'title': 'Sardar Sarovar Dam', 'start_paragraph_id': 1, 'start_character': 269, 'end_paragraph_id': 1, 'end_character': 300, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '623549', 'title': 'Sardar Sarovar Dam', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 525, 'bleu_score': 0.7704152119795531, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17464934182744576375}, 'section': 'Section::::Abstract.'}]}]