1170
Postnatal kidneys in early infants had the highest maximum concentration and the lowest clearance of melamine than the other postnatal organs .
 Chemical: melamine
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: melamine 
Answer:
 Chemical: melamine