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Hollow microlattices constitute a model topology for architected materials , as they combine excellent specific stiffness and strength with relative ease of manufacturing .
 concept or principle: model; concept or principle: materials; material: as; machanical property: specific stiffness; machanical property: strength; manufacturing process: manufacturing
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: model, materials, as, specific stiffness, strength, manufacturing 
Answer:
 concept or principle: model; concept or principle: materials; material: as; machanical property: specific stiffness; machanical property: strength; manufacturing process: manufacturing