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This study presents results from neutron diffraction measurements on different stages of a build-up of a simple cuboid structure by laser beam melting .
 process characterization: neutron diffraction; manufacturing process: simple; concept or principle: structure; concept or principle: laser beam
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: neutron diffraction, simple, structure, laser beam 
Answer:
 process characterization: neutron diffraction; manufacturing process: simple; concept or principle: structure; concept or principle: laser beam