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Non-melted SiC particles acted as nucleating agents promoting grain refinement .
 material: SiC; concept or principle: particles; material: as; process characterization: grain refinement
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: SiC, particles, as, grain refinement 
Answer:
 material: SiC; concept or principle: particles; material: as; process characterization: grain refinement