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A series of single tracks , layers and 3D objects were manufactured from AISI 420 stainless steel to validate a proposed algorithm .
 application: 3D objects; concept or principle: manufactured; material: AISI 420; material: steel; concept or principle: algorithm
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: 3D objects, manufactured, AISI 420, steel, algorithm 
Answer:
 application: 3D objects; concept or principle: manufactured; material: AISI 420; material: steel; concept or principle: algorithm