Sentence: Amoxicillin , erythromycin , and levofloxacin at supra-MIC concentrations were very active against planktonic cells of 3 selected strains but lower on biofilm-associated organisms in 2 strains and null against the third .
Drug combination annotation:
[{'class': 'POS', 'spans': ['Amoxicillin', 'erythromycin', 'levofloxacin'], 'is_context_needed': False}]