Question: where does blue green algae get their energy from
[{'answer': 'photosynthesis', 'provenance': [{'wikipedia_id': '129618', 'title': 'Cyanobacteria', 'start_paragraph_id': 1, 'start_character': 100, 'end_paragraph_id': 1, 'end_character': 114, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '129618', 'title': 'Cyanobacteria', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 434, 'bleu_score': 0.5994549388825571, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3001615425394006652}, 'section': 'Section::::Abstract.'}]}]