27377
The study of the structure and properties of zirconium hydrides is important for understanding the embrittlement of zirconium alloys used as cladding in light water nuclear reactors .
 Chemical: zirconium hydrides; Chemical: zirconium
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: zirconium hydrides, zirconium 
Answer:
 Chemical: zirconium hydrides; Chemical: zirconium