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Given its ability to quickly predict the thermal history and changes in melt pool geometry due to arbitrary scan paths , this method provides a potentially powerful tool for exploration and optimization of laser powder bed fusion processes .
 material: melt pool; concept or principle: geometry; machine or equipment: tool; concept or principle: optimization; manufacturing process: laser powder bed fusion
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: melt pool, geometry, tool, optimization, laser powder bed fusion 
Answer:
 material: melt pool; concept or principle: geometry; machine or equipment: tool; concept or principle: optimization; manufacturing process: laser powder bed fusion