2490
The results show significant improvement in fracture toughness and fracture energy for CF/PLA composites in comparison to neat PLA .
 concept or principle: fracture; concept or principle: fracture; material: composites; material: PLA
Given options, please tell me the categories of all the listed entity words.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} 
 Entities: fracture, fracture, composites, PLA 
Answer:
 concept or principle: fracture; concept or principle: fracture; material: composites; material: PLA