5591
Standard fatigue specimens were printed and sintered , then half of the samples were mechanically ground , while the other half were left in their aB-sintered state .
 concept or principle: Standard; machanical property: fatigue; manufacturing process: sintered; concept or principle: samples; manufacturing process: aB-sintered
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: Standard, fatigue, sintered, samples, aB-sintered 
Answer:
 concept or principle: Standard; machanical property: fatigue; manufacturing process: sintered; concept or principle: samples; manufacturing process: aB-sintered