Sentence: All patients received neoadjuvant chemotherapy with cyclophosphamide , doxorubicin , and fluorouracil , or cyclophosphamide , doxorubicin , vincristine , and prednisone .
Drug combination annotation:
[{'class': 'POS', 'spans': ['cyclophosphamide', 'doxorubicin', 'fluorouracil'], 'is_context_needed': True}, {'class': 'POS', 'spans': [3, 4, 5, 6], 'is_context_needed': True}]