22965
The liposomes were adsorbed to hydroxyapatite ( HA ) and human dental enamel using phosphate buffer and parotid saliva as adsorption media .
 Chemical: hydroxyapatite; Chemical: phosphate
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: hydroxyapatite, phosphate 
Answer:
 Chemical: hydroxyapatite; Chemical: phosphate