Question: who are the four actresses in the movie book club
[{'answer': 'Diane Keaton', 'provenance': [{'wikipedia_id': '55256895', 'title': 'Book Club (film)', 'start_paragraph_id': 1, 'start_character': 154, 'end_paragraph_id': 1, 'end_character': 166, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Jane Fonda', 'provenance': [{'wikipedia_id': '55256895', 'title': 'Book Club (film)', 'start_paragraph_id': 1, 'start_character': 168, 'end_paragraph_id': 1, 'end_character': 178, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Candice Bergen', 'provenance': [{'wikipedia_id': '55256895', 'title': 'Book Club (film)', 'start_paragraph_id': 1, 'start_character': 180, 'end_paragraph_id': 1, 'end_character': 194, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Mary Steenburgen', 'provenance': [{'wikipedia_id': '55256895', 'title': 'Book Club (film)', 'start_paragraph_id': 1, 'start_character': 200, 'end_paragraph_id': 1, 'end_character': 216, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '55256895', 'title': 'Book Club (film)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 376, 'bleu_score': 0.7075419883575681, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1124746748202182789}, 'section': 'Section::::Abstract.'}]}]