Task: Named Entity Recognition
Input (English):  Cell viability was assessed by 2 - ( 2 - methoxy - 4 - nitrophenyl ) - 3 - ( 4 - nitrophenyl ) - 5 - ( 2 , 4 - disulfophenyl ) - 2H - tetrazolium monosodium salt assay , while apoptosis was determined by terminal deoxynucleotidyl transferase - mediated dUTP nick end labeling stain .
Output (English): Cell