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The SLS prototypes have a greater dimensional accuracy than the PolyJet and 3DP models .
 concept or principle: SLS prototypes; process characterization: dimensional accuracy; concept or principle: PolyJet; manufacturing process: 3DP
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: SLS prototypes, dimensional accuracy, PolyJet, 3DP 
Answer:
 concept or principle: SLS prototypes; process characterization: dimensional accuracy; concept or principle: PolyJet; manufacturing process: 3DP