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The layered structure of Additive Manufacturing processes results in a stair- stepping effect of the surface topographies .
 concept or principle: layered structure; manufacturing process: Additive Manufacturing processes; concept or principle: surface topographies
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: layered structure, Additive Manufacturing processes, surface topographies 
Answer:
 concept or principle: layered structure; manufacturing process: Additive Manufacturing processes; concept or principle: surface topographies