19757
Polyamidoamine ( PAMAM ) dendrimers have previously been demonstrated to elicit systematically variable cyto - and eco - toxic responses , promising as the basis for structure - activity relationships governing nanotoxicological responses .
 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: Polyamidoamine, PAMAM 
Answer:
 Chemical: Polyamidoamine; Chemical: PAMAM