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The research into these complex interrelationships are limited to 2D simple cases , where the impact of build orientation to TO and support optimization is clear .
 concept or principle: research; concept or principle: 2D; concept or principle: impact; process parameter: build orientation; application: support; concept or principle: optimization
Please list all entity words in the text that fit the category.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} 
Answer:
 concept or principle: research; concept or principle: 2D; concept or principle: impact; process parameter: build orientation; application: support; concept or principle: optimization