6558
African trypanosomes are capable of both pyrimidine biosynthesis and salvage of preformed pyrimidines from the host .
 Chemical: pyrimidine; Chemical: pyrimidines
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: pyrimidine, pyrimidines 
Answer:
 Chemical: pyrimidine; Chemical: pyrimidines