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Cork-polymer composites ( CPC ) were prepared using a Brabender type mixer incorporating 15 % ( w/w ) of cork powder ( corresponding to 55 % ( v/v ) ) and having polylactic acid ( PLA ) as matrix .
 material: composites; material: cork; material: polylactic acid; material: PLA; material: as
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: composites, cork, polylactic acid, PLA, as 
Answer:
 material: composites; material: cork; material: polylactic acid; material: PLA; material: as