5872
Hence , the cracking mechanism during SLM is believed to be as follows : crack initiation is mainly induced during solidification and is dependent on the content of minor alloying elements such as Si and C , whereas crack propagation predominantly occurs during thermal cycling .
 concept or principle: cracking; manufacturing process: SLM; material: be; material: as; concept or principle: solidification; material: alloying elements; material: as; material: C; concept or principle: crack propagation; process parameter: thermal cycling
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: cracking, SLM, be, as, solidification, alloying elements, as, C, crack propagation, thermal cycling 
Answer:
 concept or principle: cracking; manufacturing process: SLM; material: be; material: as; concept or principle: solidification; material: alloying elements; material: as; material: C; concept or principle: crack propagation; process parameter: thermal cycling