Question: when was the last time the lightning went to the stanley cup
[{'answer': '2015', 'provenance': [{'wikipedia_id': '11233172', 'title': 'List of Tampa Bay Lightning seasons', 'start_paragraph_id': 3, 'start_character': 693, 'end_paragraph_id': 3, 'end_character': 697, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '11233172', 'title': 'List of Tampa Bay Lightning seasons', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 716, 'bleu_score': 0.780332142477117, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10847339423719163332}, 'section': 'Section::::Abstract.'}]}]