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Here , spheroids are arranged by the Voronoi diagram of 3D ellipsoids and the tool path , including circular printing motions , is produced using the Voronoi diagram of circular 2D disks .
 concept or principle: 3D; concept or principle: tool path; concept or principle: 2D
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: 3D, tool path, 2D 
Answer:
 concept or principle: 3D; concept or principle: tool path; concept or principle: 2D