2243
Nitrogen - bisphosphonates ( n - BP ) , often referred to as aminobisphosphonates , are the most commonly prescribed drugs for the treatment of disorders of bone fragility .
 Chemical: Nitrogen - bisphosphonates; Chemical: n - BP; Chemical: aminobisphosphonates
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: Nitrogen - bisphosphonates, n - BP, aminobisphosphonates 
Answer:
 Chemical: Nitrogen - bisphosphonates; Chemical: n - BP; Chemical: aminobisphosphonates