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A more recent study has demonstrated a solution for a similar multifunctional optimization for a heterogeneous cellular structures using a decision support problem formulation .
 concept or principle: solution; concept or principle: optimization; engineering feature: heterogeneous cellular structures; application: support
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: solution; concept or principle: optimization; engineering feature: heterogeneous cellular structures; application: support