821
The next circle in 8 shows the plastic elongation of PLA polymer chains that continue to bear load after the failure of carbon fibers .
 material: plastic; machanical property: elongation; material: PLA; concept or principle: failure; material: carbon fibers
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: plastic; machanical property: elongation; material: PLA; concept or principle: failure; material: carbon fibers