852
Carbon fiber has been successfully applied to reinforce polymers , however , the primary issue for utilizing carbon fiber in SL is that it is opaque to the UV light .
 material: Carbon fiber; material: polymers; material: carbon fiber; manufacturing process: SL; enabling technology: UV light
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: Carbon fiber; material: polymers; material: carbon fiber; manufacturing process: SL; enabling technology: UV light