Question: what tools did the sumerians use for writing
[{'answer': 'clay tablet', 'provenance': [{'wikipedia_id': '306575', 'title': 'Clay tablet', 'start_paragraph_id': 1, 'start_character': 26, 'end_paragraph_id': 1, 'end_character': 37, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'styluses with sharp triangular tips', 'provenance': [{'wikipedia_id': '306575', 'title': 'Clay tablet', 'start_paragraph_id': 6, 'start_character': 128, 'end_paragraph_id': 6, 'end_character': 163, 'bleu_score': 1.0, 'section': 'Section::::Scribes.\n'}]}, {'provenance': [{'wikipedia_id': '306575', 'title': 'Clay tablet', 'start_paragraph_id': 6, 'start_character': 0, 'end_paragraph_id': 6, 'end_character': 599, 'bleu_score': 0.8292088310023721, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7442464020131201358}, 'section': 'Section::::Scribes.\n'}]}]