Question: when do secondary ossification centers appear in the epiphysis
[{'answer': 'after birth', 'provenance': [{'wikipedia_id': '1427908', 'title': 'Ossification', 'start_paragraph_id': 15, 'start_character': 94, 'end_paragraph_id': 15, 'end_character': 105, 'bleu_score': 1.0, 'section': 'Section::::Endochondral ossification.\n'}]}, {'answer': '9th month of fetal development', 'provenance': [{'wikipedia_id': '1427908', 'title': 'Ossification', 'start_paragraph_id': 15, 'start_character': 170, 'end_paragraph_id': 15, 'end_character': 200, 'bleu_score': 1.0, 'section': 'Section::::Endochondral ossification.\n'}]}, {'provenance': [{'wikipedia_id': '1427908', 'title': 'Ossification', 'start_paragraph_id': 15, 'start_character': 0, 'end_paragraph_id': 15, 'end_character': 425, 'bleu_score': 0.9694566079002921, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2178750902167692849}, 'section': 'Section::::Endochondral ossification.\n'}]}]