5673
This paper seeks to , instead , investigate the effects of gradual material transitions on the fatigue life of 3D printed multi-material specimens .
 material: material; machanical property: fatigue life; manufacturing process: 3D printed
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: material, fatigue life, 3D printed 
Answer:
 material: material; machanical property: fatigue life; manufacturing process: 3D printed