7731
L - canavanine , a selective inhibitor of the inducible nitric oxide synthase , increases the mean systemic filling pressure , thereby improving venous return , under these conditions .
 GENE: nitric oxide synthase
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
 Entities: nitric oxide synthase 
Answer:
 GENE: nitric oxide synthase