27357
The Fer tyrosine kinase is important for platelet - derived growth factor - BB - induced Stat3 phosphorylation , colony formation in soft agar and tumor growth in vivo .
 Chemical: tyrosine
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: tyrosine