Question: what is the name of the oven used to fire clay objects so that they become ceramics
[{'answer': 'kiln', 'provenance': [{'wikipedia_id': '17361', 'title': 'Kiln', 'start_paragraph_id': 1, 'start_character': 2, 'end_paragraph_id': 1, 'end_character': 6, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '17361', 'title': 'Kiln', 'start_paragraph_id': 28, 'start_character': 0, 'end_paragraph_id': 28, 'end_character': 708, 'bleu_score': 0.927688467726505, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9554789214673774761}, 'section': 'Section::::Ceramic kilns.\n'}]}]