10976
STK40 is a putative serine / threonine kinase and was shown to induce extraembryonic endoderm differentiation from mouse embryonic stem cells .
 Chemical: serine; Chemical: threonine
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: serine, threonine 
Answer:
 Chemical: serine; Chemical: threonine