Question: what is the name of the small red macroalgae that develop a hard crust
[{'answer': 'Coralline algae', 'provenance': [{'wikipedia_id': '1583146', 'title': 'Coralline algae', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 15, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1583146', 'title': 'Coralline algae', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 850, 'bleu_score': 0.9666817114186481, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5247422305263234010}, 'section': 'Section::::Abstract.'}]}]