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Early candidate materials that exhibit higher melting and glass transition temperatures include the Poly Ether Ether Ketone ( PEEK ) and Polyaryletherketone ( PAEK ) family of materials .
 concept or principle: materials; manufacturing process: melting; concept or principle: glass transition temperatures; material: PEEK; concept or principle: materials
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: materials, melting, glass transition temperatures, PEEK, materials 
Answer:
 concept or principle: materials; manufacturing process: melting; concept or principle: glass transition temperatures; material: PEEK; concept or principle: materials