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Boron neutron capture therapy ( BNCT ) is a radiotherapy based cancer treatment requiring the availability of a low energy thermal neutron beam and a boron containing drug .
 Chemical: Boron; Chemical: boron
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: Boron; Chemical: boron