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However , use of the FFF approach to fabricate scaffolds with medical grade PLLA polymer remains largely unexplored .
 manufacturing process: FFF; manufacturing process: fabricate; application: medical; material: polymer
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: FFF, fabricate, medical, polymer 
Answer:
 manufacturing process: FFF; manufacturing process: fabricate; application: medical; material: polymer