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Additive manufacturing ( AM ) , also called 3D-printing , is an innovative technology , as the printing of objects is performed by layer-by-layer deposition .
 manufacturing process: Additive manufacturing; manufacturing process: AM; manufacturing process: 3D-printing; concept or principle: technology; material: as; concept or principle: layer-by-layer deposition
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 manufacturing, AM, 3D-printing, technology, as, layer-by-layer deposition 
Answer:
 manufacturing process: Additive manufacturing; manufacturing process: AM; manufacturing process: 3D-printing; concept or principle: technology; material: as; concept or principle: layer-by-layer deposition