Question: who played the character mongo in the movie blazing saddles
[{'answer': 'Alexander George Karras', 'provenance': [{'wikipedia_id': '880255', 'title': 'Alex Karras', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 23, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '880255', 'title': 'Alex Karras', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 688, 'bleu_score': 0.9522287480520011, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 18187909012309765660}, 'section': 'Section::::Abstract.'}]}]