Sentence: Patients were divided randomly into 3 groups ( Group A : 0.5 % bupivacaine 5 mL , n = 12 ; Group B : 0.5 % bupivacaine 4.5 mL + 20 mg of triamcinolone 0.5 mL , n = 10 ; and Group C : 0.5 % bupivacaine 4 mL + 40 mg of triamcinolone 1 mL , n = 10 ) .
Drug combination annotation:
[{'class': 'POS', 'spans': ['bupivacaine', 'triamcinolone'], 'is_context_needed': True}, {'class': 'POS', 'spans': [3, 4], 'is_context_needed': True}]