3536
As inclusion number density increased from 8866/mm2 to 45909/mm2 , yield stress increased to 26 % .
 As, density, yield stress
Please list all entity words in the text that fit the category. Output format is "word1, 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:
 As, density, yield stress