Question: what does the bc in bc powder stand for
[{'answer': 'Germain Bernard and C.T. Council'}, {'provenance': [{'wikipedia_id': '2447916', 'title': 'BC Powder', 'start_paragraph_id': 1, 'start_character': 66, 'end_paragraph_id': 1, 'end_character': 1114, 'bleu_score': 0.832551989566885, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14919984014440047101}, 'section': 'Section::::Abstract.'}]}]