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The tool making for friction stir welding purpose , complex geometries , etc .
 machine or equipment: tool; manufacturing process: friction stir welding; concept or principle: complex geometries
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: tool, friction stir welding, complex geometries 
Answer:
 machine or equipment: tool; manufacturing process: friction stir welding; concept or principle: complex geometries