3663
Because of the rapid systemic clearance of BCNU ( 1 , 3 - bis - ( 2 - chloroethyl ) - 1 - nitrosourea ) , intra - arterial administration should provide a substantial advantage over intravenous administration for the treatment of malignant gliomas .
 Chemical: BCNU; Chemical: 1 , 3 - bis - ( 2 - chloroethyl ) - 1 - nitrosourea; Disease: malignant gliomas
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
 Entities: BCNU, 1 , 3 - bis - ( 2 - chloroethyl ) - 1 - nitrosourea, malignant gliomas 
Answer:
 Chemical: BCNU; Chemical: 1 , 3 - bis - ( 2 - chloroethyl ) - 1 - nitrosourea; Disease: malignant gliomas