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As outlined by Gibson , this is related to common meso- and microstructural features of cellular structures , affecting the structural performance , including : 1 ) material properties ; 2 ) cell topology and shape ; 3 ) relative density of structure .
 material: As; concept or principle: microstructural; engineering feature: cellular structures; process characterization: structural performance; concept or principle: material properties; concept or principle: cell topology; machanical property: relative density; concept or principle: structure
Please list all entity words in the text that fit the category.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} 
Answer:
 material: As; concept or principle: microstructural; engineering feature: cellular structures; process characterization: structural performance; concept or principle: material properties; concept or principle: cell topology; machanical property: relative density; concept or principle: structure