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Cellular materials have also been seen as a crucial enabler for large system-level multi-functional design optimization , such as in an aircraft wing .
 material: Cellular materials; material: as; concept or principle: multi-functional design optimization; material: as; application: aircraft wing
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: Cellular materials; material: as; concept or principle: multi-functional design optimization; material: as; application: aircraft wing