1486
The final structures are composed of ∼60 % silicone powder , ∼ 30 % silicone binder , and < 10 % air voids .
 material: silicone powder; material: silicone binder; concept or principle: voids
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: silicone powder, silicone binder, voids 
Answer:
 material: silicone powder; material: silicone binder; concept or principle: voids