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This is achieved by incorporating the effects of a system , comprised of a number of connected functional components , on the structural response of a part within a structural topology optimization procedure .
 concept or principle: functional components; engineering feature: topology optimization
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: functional components, topology optimization 
Answer:
 concept or principle: functional components; engineering feature: topology optimization