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The brittle cracking model enables the estimation of element degradation as a result of crack development and thus eliminates the need for the extremely refined mesh .
 machanical property: brittle; concept or principle: model; material: element; concept or principle: degradation; material: as
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: brittle, model, element, degradation, as 
Answer:
 machanical property: brittle; concept or principle: model; material: element; concept or principle: degradation; material: as