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The feasibility of using thermal based additive manufacturing with multi-component ceramic materials has therefore been established , which represents a potential solution to off-world bulk structure manufacture for future human space exploration .
 concept or principle: feasibility; manufacturing process: additive manufacturing; material: ceramic materials; concept or principle: solution; concept or principle: structure manufacture
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: feasibility, additive manufacturing, ceramic materials, solution, structure manufacture 
Answer:
 concept or principle: feasibility; manufacturing process: additive manufacturing; material: ceramic materials; concept or principle: solution; concept or principle: structure manufacture