7138
Undesirable residual stress and distortion caused by thermal gradients are a common source of failure in AM builds .
 machanical property: residual stress; concept or principle: distortion; process parameter: thermal gradients; application: source; concept or principle: failure; manufacturing process: AM
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: residual stress, distortion, thermal gradients, source, failure, AM 
Answer:
 machanical property: residual stress; concept or principle: distortion; process parameter: thermal gradients; application: source; concept or principle: failure; manufacturing process: AM