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A stereolithographic approach based on thiol-ene click chemistry is developed to 3D print preceramic polymers into infusible thermosets .
 concept or principle: chemistry; manufacturing process: 3D print; material: polymers
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: chemistry, 3D print, polymers 
Answer:
 concept or principle: chemistry; manufacturing process: 3D print; material: polymers