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For instance , customized implants aimed at directly replicating the bone shape for replacement , tree-like support structures , nervouB-system-inspired shade or hierarchical networks where nodes constantly branch and merge .
 application: implants; process parameter: bone shape; machanical property: tree-like support structures; concept or principle: hierarchical networks
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:
 application: implants; process parameter: bone shape; machanical property: tree-like support structures; concept or principle: hierarchical networks