2537
Additive manufacturing potential of cold spray technology was used to fabricate freestanding samples of a copper alloy .
 manufacturing process: Additive manufacturing; concept or principle: technology; manufacturing process: fabricate; concept or principle: samples; material: copper alloy
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: Additive manufacturing, technology, fabricate, samples, copper alloy 
Answer:
 manufacturing process: Additive manufacturing; concept or principle: technology; manufacturing process: fabricate; concept or principle: samples; material: copper alloy