Question: which part of eucalyptus tree gives us oil
[{'answer': 'the leaf', 'provenance': [{'wikipedia_id': '4956676', 'title': 'Eucalyptus oil', 'start_paragraph_id': 1, 'start_character': 58, 'end_paragraph_id': 1, 'end_character': 66, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '4956676', 'title': 'Eucalyptus oil', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 394, 'bleu_score': 0.9657992495762461, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15933067934028441852}, 'section': 'Section::::Abstract.'}]}]