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Various potential empirical modelling techniques coexist so that the choice of an appropriate modelling technique for a given AM process can be made .
 concept or principle: empirical; enabling technology: modelling; manufacturing process: AM process; material: be
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: empirical, modelling, AM process, be 
Answer:
 concept or principle: empirical; enabling technology: modelling; manufacturing process: AM process; material: be