2711
Through twin-screw extrusion , four different formulations were obtained using combinations of hollow glass microspheres , nanoclay , and non-halogenated flame-retardant additives .
 manufacturing process: extrusion; material: glass; material: additives
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: extrusion, glass, additives 
Answer:
 manufacturing process: extrusion; material: glass; material: additives