22891
This study also reveals , for the first time , the ability to distinguish between P - O and P [ double bond , length as m - dash ] O bonding in these rare - earth phosphate glasses from X - ray diffraction data in a fully quantitative manner .
 Chemical: P - O; Chemical: P; Chemical: O; Chemical: rare - earth 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: P - O, P, O, rare - earth phosphate 
Answer:
 Chemical: P - O; Chemical: P; Chemical: O; Chemical: rare - earth phosphate