Question: who scored fastest century for rr in ipl history
[{'answer': 'Shane Watson', 'provenance': [{'wikipedia_id': '31521120', 'title': 'List of Indian Premier League centuries', 'start_paragraph_id': 4, 'start_character': 147, 'end_paragraph_id': 4, 'end_character': 159, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]