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The categorization of natural cellular structures is discussed in more detail in a recent review article which focuses on biomimetic design of cellular materials utilizing cellular designs in engineering systems .
 engineering feature: cellular structures; engineering feature: biomimetic design; material: cellular materials; engineering feature: cellular designs; application: engineering
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:
 engineering feature: cellular structures; engineering feature: biomimetic design; material: cellular materials; engineering feature: cellular designs; application: engineering