3600
The accumulation of N - BPs in bones suggests that they may act more effectively on tumors that have spread to bones or on Ras - variable tumors .
 Chemical: N; Chemical: BPs
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: N, BPs 
Answer:
 Chemical: N; Chemical: BPs