Sentence: Tazobactam has inhibitory activity , and therefore protects piperacillin against Richmond and Sykes types II , III , IV and V beta-lactamases , staphylococcal penicillinase and extended-spectrum beta-lactamases .
Drug combination annotation:
[{'class': 'POS', 'spans': ['Tazobactam', 'piperacillin'], 'is_context_needed': True}]