Question: which type of algae do carrageenans come from
[{'answer': 'red edible seaweeds', 'provenance': [{'wikipedia_id': '235950', 'title': 'Carrageenan', 'start_paragraph_id': 1, 'start_character': 135, 'end_paragraph_id': 1, 'end_character': 154, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '235950', 'title': 'Carrageenan', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 564, 'bleu_score': 0.8806486852078601, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4279655456138408441}, 'section': 'Section::::Abstract.'}]}]