Question: who are the leaders of the green party
[{'answer': 'Caroline Lucas', 'provenance': [{'wikipedia_id': '79787', 'title': 'Green Party of England and Wales', 'start_paragraph_id': 3, 'start_character': 500, 'end_paragraph_id': 3, 'end_character': 514, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Jonathan Bartley', 'provenance': [{'wikipedia_id': '79787', 'title': 'Green Party of England and Wales', 'start_paragraph_id': 1, 'start_character': 187, 'end_paragraph_id': 1, 'end_character': 203, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '79787', 'title': 'Green Party of England and Wales', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 435, 'bleu_score': 0.637007188456165, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2630651902913805279}, 'section': 'Section::::Abstract.'}]}]