Question: who was the clemson head football coach when they won the 1981 national championship
[{'answer': 'Danny Ford', 'provenance': [{'wikipedia_id': '14614577', 'title': '1981 Clemson Tigers football team', 'start_paragraph_id': 1, 'start_character': 137, 'end_paragraph_id': 1, 'end_character': 147, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]