5822
Results show that , to achieve near-full density parts , the energy absorption ( Qa ) by the local powder bed should be approximately 3–8 times greater than the energy consumption ( Qc ) , and this finding applies to all materials investigated .
 machanical property: density; process characterization: energy absorption; machine or equipment: powder bed; material: be; concept or principle: materials
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: density, energy absorption, powder bed, be, materials 
Answer:
 machanical property: density; process characterization: energy absorption; machine or equipment: powder bed; material: be; concept or principle: materials