25
The next step in exploiting “ true ” arc-welding-based additive manufacturing is to develop the automation software required to produce CAD-to-part capability .
 concept or principle: step; manufacturing process: arc-welding-based additive manufacturing; concept or principle: automation; concept or principle: CAD-to-part
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: step, arc-welding-based additive manufacturing, automation, CAD-to-part 
Answer:
 concept or principle: step; manufacturing process: arc-welding-based additive manufacturing; concept or principle: automation; concept or principle: CAD-to-part