Question: who plays romeo in romeo and juliet 1968
[{'answer': 'Leonard Whiting', 'provenance': [{'wikipedia_id': '99025', 'title': 'Romeo and Juliet (1968 film)', 'start_paragraph_id': 2, 'start_character': 69, 'end_paragraph_id': 2, 'end_character': 84, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '99025', 'title': 'Romeo and Juliet (1968 film)', 'start_paragraph_id': 10, 'start_character': 0, 'end_paragraph_id': 10, 'end_character': 45, 'bleu_score': 0.6147881529512641, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15477729420972417738}, 'section': 'Section::::Cast.\n'}]}]