Question: who attended the second round table conference as the representative of the congress
[{'answer': 'Mahatma Gandhi', 'provenance': [{'wikipedia_id': '1961206', 'title': 'Round Table Conferences (India)', 'start_paragraph_id': 1, 'start_character': 564, 'end_paragraph_id': 1, 'end_character': 578, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]