65508
The surface of this type of mixing valve , against which surface the cavitation bubbles are driven causing their implosion , undergoes tremendous mechanical and thermal localized stress ; they are therefore often constructed of super-hard or tough materials such as stainless steel , Stellite , or even polycrystalline diamond ( PCD ) .
 location: Stellite
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Stellite 
Answer:
 location: Stellite