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By consolidating preceramic monomers via layer-wise exposure to ultraviolet light and subsequently pyrolyzing under an inert atmosphere to form a ceramic , this method allows for complex geometry parts that can not be produced with traditional sintering , pressing or vapor infiltration processes .
 exposure, ultraviolet light, ceramic, complex geometry, be, sintering, pressing, infiltration
Please list all entity words in the text that fit the category. Output format is "word1, 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} 
Answer:
 exposure, ultraviolet light, ceramic, complex geometry, be, sintering, pressing, infiltration