5655
The martensite morphology appeared to be finer at a lower preheating temperature , whereas the observed subgrain structure did not seem to be influenced by the preheating temperatures .
 material: martensite; material: be; manufacturing process: preheating; concept or principle: structure; material: be; manufacturing process: preheating
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: martensite, be, preheating, structure, be, preheating 
Answer:
 material: martensite; material: be; manufacturing process: preheating; concept or principle: structure; material: be; manufacturing process: preheating