4200
Furthermore , an X-ray Computed Tomography ( X-CT ) analysis is carried out to visualize the pores formed during the L-PBF process .
 process characterization: X-ray Computed Tomography; machanical property: pores; manufacturing process: L-PBF
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: X-ray Computed Tomography, pores, L-PBF 
Answer:
 process characterization: X-ray Computed Tomography; machanical property: pores; manufacturing process: L-PBF