Question: production of new bony matrix is by which cell type
[{'answer': 'Osteoblasts', 'provenance': [{'wikipedia_id': '4099', 'title': 'Bone', 'start_paragraph_id': 2, 'start_character': 221, 'end_paragraph_id': 2, 'end_character': 232, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '4099', 'title': 'Bone', 'start_paragraph_id': 19, 'start_character': 0, 'end_paragraph_id': 19, 'end_character': 1101, 'bleu_score': 0.559819932682175, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16108956476363880589}, 'section': 'Section::::Structure.:Bone cells.:Osteoblast.\n'}]}]