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As a step towards addressing this knowledge gap , a workshop was held at the National Science Foundation ( NSF ) to discuss the educational needs to prepare industry for AM and its use in different fields .
 material: As; concept or principle: step; application: industry; manufacturing process: AM
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: As, step, industry, AM 
Answer:
 material: As; concept or principle: step; application: industry; manufacturing process: AM