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The advent of additive manufacturing ( AM ) , also often referred to as 3D printing , has enabled the rapid production of parts with complex geometries that are either labor-intensive or unrealizable by traditional manufacturing methods .
 manufacturing process: additive manufacturing; manufacturing process: AM; material: as; manufacturing process: 3D printing; manufacturing process: production; concept or principle: complex geometries; manufacturing process: traditional manufacturing
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, as, 3D printing, production, complex geometries, traditional manufacturing 
Answer:
 manufacturing process: additive manufacturing; manufacturing process: AM; material: as; manufacturing process: 3D printing; manufacturing process: production; concept or principle: complex geometries; manufacturing process: traditional manufacturing