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The samples with the hybrid grain structure , however , exhibits a highly limited or no ductility due to intergranular fracturing .
 concept or principle: samples; concept or principle: grain structure; machanical property: ductility
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: samples, grain structure, ductility 
Answer:
 concept or principle: samples; concept or principle: grain structure; machanical property: ductility