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The layer-by-layer printing process of additive manufacturing methods provides new opportunities to embed identification codes inside parts during manufacture .
 concept or principle: layer-by-layer; concept or principle: process; manufacturing process: additive manufacturing; concept or principle: manufacture
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: layer-by-layer, process, additive manufacturing, manufacture 
Answer:
 concept or principle: layer-by-layer; concept or principle: process; manufacturing process: additive manufacturing; concept or principle: manufacture