8199
The results show that bond strength improved over 100 % with 30 s of treatment and over 50 % with 300 s of treatment .
 concept or principle: bond strength; material: s; material: s
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: bond strength, s, s 
Answer:
 concept or principle: bond strength; material: s; material: s