884
A parametric study further showed the effect of abrasive size , abrasive concentration , ultrasonic amplitude and working gap on UCAF ’ s performance .
 material: abrasive; material: abrasive; material: s; concept or principle: performance
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: abrasive, abrasive, s, performance 
Answer:
 material: abrasive; material: abrasive; material: s; concept or principle: performance