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2 True biomimicry True biomimicry of natural form , involves the purposeful emulation of structure-function relationships in biological entities to solve engineering challenges , or to apply these to advanced engineering systems .
 concept or principle: biomimicry; concept or principle: biomimicry; material: biological entities; application: engineering; 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:
 concept or principle: biomimicry; concept or principle: biomimicry; material: biological entities; application: engineering; application: engineering