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Two batches of pre-alloyed Hastelloy-X powder with different Si , Mn and C contents were used to produce specimens by Selective Laser Melting ( SLM ) .
 material: powder; material: Si; material: Mn; material: C; manufacturing process: Selective Laser Melting; manufacturing process: SLM
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: powder, Si, Mn, C, Selective Laser Melting, SLM 
Answer:
 material: powder; material: Si; material: Mn; material: C; manufacturing process: Selective Laser Melting; manufacturing process: SLM