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Additive processes like Fused Filament Fabrication ( FFF ) inexpensively generate such complex geometries , but potential defects may limit these components ’ viability in critical applications .
 material: Additive; manufacturing process: Fused Filament Fabrication; manufacturing process: FFF; concept or principle: complex geometries; concept or principle: defects; concept or principle: limit; machine or equipment: components
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: Additive, Fused Filament Fabrication, FFF, complex geometries, defects, limit, components 
Answer:
 material: Additive; manufacturing process: Fused Filament Fabrication; manufacturing process: FFF; concept or principle: complex geometries; concept or principle: defects; concept or principle: limit; machine or equipment: components