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Four designs , including air-filled and polycarbonate ( PC ) dielectric-filled waveguides and two-pole filters , are modeled and manufactured using additive manufacturing to demonstrate this integrative approach .
 engineering feature: designs; material: polycarbonate; material: PC; application: filters; concept or principle: manufactured; manufacturing process: additive manufacturing
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: designs, polycarbonate, PC, filters, manufactured, additive manufacturing 
Answer:
 engineering feature: designs; material: polycarbonate; material: PC; application: filters; concept or principle: manufactured; manufacturing process: additive manufacturing