15414
The angiopoietin ( Angpt ) / Tie2 system consists of the transmembrane endothelial tyrosine kinase Tie2 and its circulating ligands ( Angpt - 1 , - 2 , and - 3 / 4 ) .
 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