Question: ganga action plan was started in which year
[{'answer': '1986', 'provenance': [{'wikipedia_id': '10505266', 'title': 'Pollution of the Ganges', 'start_paragraph_id': 39, 'start_character': 101, 'end_paragraph_id': 39, 'end_character': 105, 'bleu_score': 1.0, 'section': 'Section::::Cleanup efforts.:Ganges Action Plan.\n'}]}, {'provenance': [{'wikipedia_id': '10505266', 'title': 'Pollution of the Ganges', 'start_paragraph_id': 40, 'start_character': 0, 'end_paragraph_id': 40, 'end_character': 386, 'bleu_score': 0.633450059521937, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4474963178763700335}, 'section': 'Section::::Cleanup efforts.:Ganges Action Plan.\n'}]}]