Question: what is the largest type of big cats in the world
[{'answer': 'tigers', 'provenance': [{'wikipedia_id': '165456', 'title': 'Big cat', 'start_paragraph_id': 35, 'start_character': 76, 'end_paragraph_id': 35, 'end_character': 82, 'bleu_score': 1.0, 'section': 'Section::::Weight range.\n'}]}]