501
The design approach is demonstrated with the Fe-50 at. % Co alloy , as a model material of interest for electromagnetic applications .
 engineering feature: design; material: Co; material: alloy; material: as; concept or principle: model material
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: design, Co, alloy, as, model material 
Answer:
 engineering feature: design; material: Co; material: alloy; material: as; concept or principle: model material