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The interest of selective laser melting ( SLM ) Al-based alloys for lightweight applications , especially the rare earth element Sc modified Al-Mg alloy , is increasing .
 manufacturing process: selective laser melting; manufacturing process: SLM; material: alloys; concept or principle: lightweight; material: element; material: Al-Mg alloy
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: selective laser melting, SLM, alloys, lightweight, element, Al-Mg alloy 
Answer:
 manufacturing process: selective laser melting; manufacturing process: SLM; material: alloys; concept or principle: lightweight; material: element; material: Al-Mg alloy