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Validation of part distortion predicted by the QTM model against both experiment and data in literature showed a relative error less than 20 % .
 concept or principle: Validation; concept or principle: distortion; concept or principle: QTM model; concept or principle: experiment; concept or principle: data; concept or principle: relative error
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: Validation, distortion, QTM model, experiment, data, relative error 
Answer:
 concept or principle: Validation; concept or principle: distortion; concept or principle: QTM model; concept or principle: experiment; concept or principle: data; concept or principle: relative error