19756
Generation of intracellular reactive oxygen species and genotoxicity effect to exposure of nanosized polyamidoamine ( PAMAM ) dendrimers in PLHC - 1 cells in vitro .
 Chemical: oxygen; Chemical: polyamidoamine; Chemical: PAMAM
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: oxygen, polyamidoamine, PAMAM 
Answer:
 Chemical: oxygen; Chemical: polyamidoamine; Chemical: PAMAM