Question: where does the flow of energy in an ecosystem begin
[{'answer': 'Solar energy', 'provenance': [{'wikipedia_id': '321382', 'title': 'Energy flow (ecology)', 'start_paragraph_id': 3, 'start_character': 12, 'end_paragraph_id': 3, 'end_character': 24, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '321382', 'title': 'Energy flow (ecology)', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 709, 'bleu_score': 0.9822204502117851, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7977130222820232269}, 'section': 'Section::::Abstract.'}]}]