Question: where would a coral reef most likely be found
[{'answer': 'shallow depths in tropical waters', 'provenance': [{'wikipedia_id': '87410', 'title': 'Coral reef', 'start_paragraph_id': 3, 'start_character': 451, 'end_paragraph_id': 3, 'end_character': 484, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '87410', 'title': 'Coral reef', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 566, 'bleu_score': 0.7618258316298591, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13624638739101474059}, 'section': 'Section::::Abstract.'}]}]