Question: what is the theme of and the mountains echoed
[{'answer': 'the rapport between siblings', 'provenance': [{'wikipedia_id': '37662177', 'title': 'And the Mountains Echoed', 'start_paragraph_id': 2, 'start_character': 244, 'end_paragraph_id': 2, 'end_character': 272, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '37662177', 'title': 'And the Mountains Echoed', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 498, 'bleu_score': 0.9731482306711111, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3487933151886642362}, 'section': 'Section::::Abstract.'}]}]