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Here , a magnetic filament consisting of polylactic acid ( PLA ) polymer and 40 wt. % iron was used to print a variety of samples to investigate how the macroscopic sample shape and the mesoscopic infill orientation and infill percentage affects the magnetic properties .
 material: filament; material: polylactic acid; material: PLA; material: polymer; material: iron; manufacturing process: print; concept or principle: samples; concept or principle: macroscopic; process parameter: infill; process parameter: infill percentage; concept or principle: properties
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: filament, polylactic acid, PLA, polymer, iron, print, samples, macroscopic, infill, infill percentage, properties 
Answer:
 material: filament; material: polylactic acid; material: PLA; material: polymer; material: iron; manufacturing process: print; concept or principle: samples; concept or principle: macroscopic; process parameter: infill; process parameter: infill percentage; concept or principle: properties