4138
In contrast , the thin YSZ layer formed on a cermet surface showed no yttrium depletion .
 material: YSZ; process parameter: layer; material: cermet; material: yttrium
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: manufacturing standard, machanical property, manufacturing process, material, engineering feature, process parameter, machine or equipment, application, process characterization, enabling technology, biomedical, concept or principle 
Text: {0} 
 Entities: YSZ, layer, cermet, yttrium 
Answer:
 material: YSZ; process parameter: layer; material: cermet; material: yttrium