1396
Changes in the defect morphology were monitored via interrupted fatigue testing with periodic X-ray computed tomography ( CT ) scanning .
 concept or principle: defect; process characterization: fatigue testing; process characterization: X-ray computed tomography; enabling technology: CT; concept or principle: scanning
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: defect, fatigue testing, X-ray computed tomography, CT, scanning 
Answer:
 concept or principle: defect; process characterization: fatigue testing; process characterization: X-ray computed tomography; enabling technology: CT; concept or principle: scanning