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Representative data of weld strength as a function of printing parameters on a commercial 3D printer demonstrates the robustness of the method .
 concept or principle: data; machanical property: weld strength; material: as; concept or principle: parameters; machine or equipment: 3D printer; machanical property: robustness
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: data, weld strength, as, parameters, 3D printer, robustness 
Answer:
 concept or principle: data; machanical property: weld strength; material: as; concept or principle: parameters; machine or equipment: 3D printer; machanical property: robustness