Question: who directed the 1968 version of romeo and juliet
[{'answer': 'Franco Zeffirelli', 'provenance': [{'wikipedia_id': '99025', 'title': 'Romeo and Juliet (1968 film)', 'start_paragraph_id': 2, 'start_character': 40, 'end_paragraph_id': 2, 'end_character': 57, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '99025', 'title': 'Romeo and Juliet (1968 film)', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 516, 'bleu_score': 0.9173681380043031, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6419616866652717877}, 'section': 'Section::::Abstract.'}]}]