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An average stress distribution of the solid body serves as the basis upon which the unit cell topology with geometrical features is determined prior to the mapping onto the initial geometry .
 concept or principle: average; concept or principle: distribution; material: as; concept or principle: unit cell topology; engineering feature: geometrical features; concept or principle: geometry
Please list all entity words in the text that fit the category.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} 
Answer:
 concept or principle: average; concept or principle: distribution; material: as; concept or principle: unit cell topology; engineering feature: geometrical features; concept or principle: geometry