29032
The compound class of 3 - carboranyl thymidine analogues ( 3CTAs ) are boron delivery agents for boron neutron capture therapy ( BNCT ) , a binary treatment modality for cancer .
 Chemical: 3 - carboranyl thymidine; Chemical: boron; Chemical: boron
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: 3 - carboranyl thymidine, boron, boron 
Answer:
 Chemical: 3 - carboranyl thymidine; Chemical: boron; Chemical: boron