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Due to the positional capability of some welding processes , WAAM is able to deposit parts with overhanging features in an arbitrary direction without additional support structures .
 manufacturing process: welding; concept or principle: processes; manufacturing process: WAAM; engineering feature: overhanging features; engineering feature: support structures
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: welding, processes, WAAM, overhanging features, support structures 
Answer:
 manufacturing process: welding; concept or principle: processes; manufacturing process: WAAM; engineering feature: overhanging features; engineering feature: support structures