5871
It was found that low Si and C contents help in avoiding crack formation whereas cracking propensity was relatively independent of Mn concentration .
 Si, C, cracking, Mn
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:
 Si, C, cracking, Mn