Question: scratches in rock produced by glacial abrasion are called
[{'answer': 'Glacial striations', 'provenance': [{'wikipedia_id': '2080127', 'title': 'Glacial striation', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 18, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2080127', 'title': 'Glacial striation', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 341, 'bleu_score': 0.9645876452711911, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9845825521711215016}, 'section': 'Section::::Abstract.'}]}]