Question: annie liebovitz is known for her photographs in which area
[{'answer': 'portrait', 'provenance': [{'wikipedia_id': '18943868', 'title': 'Annie Leibovitz', 'start_paragraph_id': 1, 'start_character': 67, 'end_paragraph_id': 1, 'end_character': 75, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '18943868', 'title': 'Annie Leibovitz', 'start_paragraph_id': 1, 'start_character': 222, 'end_paragraph_id': 1, 'end_character': 446, 'bleu_score': 0.653010000851723, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4116156018562456879}, 'section': 'Section::::Abstract.'}]}]