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Current 3D-printing ( additive manufacturing ) technologies for silicones mainly rely on the extrusion of high-viscosity pre-elastomer inks of one or two parts .
 manufacturing process: 3D-printing; manufacturing process: additive manufacturing; concept or principle: technologies; material: silicones; manufacturing process: extrusion
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: 3D-printing, additive manufacturing, technologies, silicones, extrusion 
Answer:
 manufacturing process: 3D-printing; manufacturing process: additive manufacturing; concept or principle: technologies; material: silicones; manufacturing process: extrusion