2639
A missense mutation , Gly - 561 - - > Ser , was identified within the proposed glycoprotein Ib binding domain of vWF in the proband with von Willebrand disease type B , a unique variant characterized by no ristocetin - induced , but normal botrocetin - induced , binding to glycoprotein Ib .
 Disease: von Willebrand disease type B
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Disease 
Text: {0} 
 Entities: von Willebrand disease type B 
Answer:
 Disease: von Willebrand disease type B