1853
Thus , the main objective of this paper is to review the main NDT techniques and assess the capability of detecting WAAM defects , for inspection either in a monitoring , in-process or post-process scenario .
 concept or principle: NDT; manufacturing process: WAAM; concept or principle: defects; process characterization: inspection; concept or principle: post-process
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: NDT, WAAM, defects, inspection, post-process 
Answer:
 concept or principle: NDT; manufacturing process: WAAM; concept or principle: defects; process characterization: inspection; concept or principle: post-process