27359
In the present report , we show that Fer associates with the activated PDGFbeta receptor ( PDGFRbeta ) through multiple autophosphorylation sites , i . e . Tyr579 , Tyr581 , Tyr740 and Tyr1021 .
 Chemical: Tyr579; Chemical: Tyr581; Chemical: Tyr740; Chemical: Tyr1021
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: Tyr579, Tyr581, Tyr740, Tyr1021 
Answer:
 Chemical: Tyr579; Chemical: Tyr581; Chemical: Tyr740; Chemical: Tyr1021