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We built this model based on the observation that any AM process exhibits a high level of redundancy and periodicity , making it an ideal problem for machine learning and surrogate modeling.We introduced a unique geometry representation that is the key insight for this work .
 concept or principle: model; manufacturing process: AM process; machine or equipment: machine; concept or principle: geometry
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: model, AM process, machine, geometry 
Answer:
 concept or principle: model; manufacturing process: AM process; machine or equipment: machine; concept or principle: geometry