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Cellular materials , such as foams , can be used as load bearing members in civil construction and as protective energy absorbing structures for personnel and equipment .
 Cellular materials, as, be, as, construction, as, equipment
Please list all entity words in the text that fit the category. Output format is "word1, 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:
 Cellular materials, as, be, as, construction, as, equipment