8173
Producing ceramics with hollow struts by surface coating with preceramic polymers .
 material: ceramics; machine or equipment: struts; concept or principle: surface; application: coating; material: polymers
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: ceramics, struts, surface, coating, polymers 
Answer:
 material: ceramics; machine or equipment: struts; concept or principle: surface; application: coating; material: polymers