Question: where do we find the philosophical origin of social work
[{'answer': '19th century philanthropy'}, {'provenance': [{'wikipedia_id': '20766046', 'title': 'History of social work', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 352, 'bleu_score': 0.7833894698330981, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11498130212921020631}, 'section': 'Section::::Abstract.'}]}]