7004
In laser powder bed fusion ( PBF-LB ) , material is continuously ejected from the melt pool , commonly called spatter , and is distributed throughout the build chamber .
 manufacturing process: laser powder bed fusion; material: material; material: melt pool; process characterization: spatter; process parameter: build chamber
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: laser powder bed fusion, material, melt pool, spatter, build chamber 
Answer:
 manufacturing process: laser powder bed fusion; material: material; material: melt pool; process characterization: spatter; process parameter: build chamber