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Continuous carbon nanotube ( CNT ) yarn filaments can be employed as an inherently multifunctional feedstock for additive manufacturing ( AM ) .
 carbon nanotube, CNT, yarn filaments, be, as, feedstock, additive manufacturing, AM
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:
 carbon nanotube, CNT, yarn filaments, be, as, feedstock, additive manufacturing, AM