Question: what can you cast in a plaster mold
[{'answer': 'non-ferrous materials', 'provenance': [{'wikipedia_id': '21019552', 'title': 'Plaster mold casting', 'start_paragraph_id': 1, 'start_character': 248, 'end_paragraph_id': 1, 'end_character': 269, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '21019552', 'title': 'Plaster mold casting', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 447, 'bleu_score': 0.777725165797658, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10545735297377694326}, 'section': 'Section::::Abstract.'}]}]