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A variety of porosity distributions and types of pores may be present in parts produced by LBPF and the effectiveness of pore closure may differ depending on these pore characteristics .
 machanical property: porosity; concept or principle: distributions; machanical property: pores; material: be; concept or principle: effectiveness; machanical property: pore; machanical property: pore
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: porosity, distributions, pores, be, effectiveness, pore, pore 
Answer:
 machanical property: porosity; concept or principle: distributions; machanical property: pores; material: be; concept or principle: effectiveness; machanical property: pore; machanical property: pore