Question: which four world leaders attended the versailles peace conference
[{'answer': 'David Lloyd George of Britain', 'provenance': [{'wikipedia_id': '16998710', 'title': 'Big Four (World War I)', 'start_paragraph_id': 1, 'start_character': 266, 'end_paragraph_id': 1, 'end_character': 289, 'bleu_score': 0.668740304976422, 'section': 'Section::::Abstract.'}]}, {'answer': 'Vittorio Emanuele Orlando of Italy', 'provenance': [{'wikipedia_id': '16998710', 'title': 'Big Four (World War I)', 'start_paragraph_id': 1, 'start_character': 310, 'end_paragraph_id': 1, 'end_character': 344, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Georges Clemenceau of France', 'provenance': [{'wikipedia_id': '16998710', 'title': 'Big Four (World War I)', 'start_paragraph_id': 1, 'start_character': 350, 'end_paragraph_id': 1, 'end_character': 378, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Woodrow Wilson of the United States'}, {'provenance': [{'wikipedia_id': '16998710', 'title': 'Big Four (World War I)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 378, 'bleu_score': 0.9338603241255111, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10969227292505454020}, 'section': 'Section::::Abstract.'}]}]