1035
The most prominent TO approaches can be summarized as follows : Density-based ; Level Set ; Evolutionary/Genetic Algorithms ; Topological Derivatives and Phase Field .
 material: be; material: as; application: Set; concept or principle: Algorithms; concept or principle: Phase
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:
 material: be; material: as; application: Set; concept or principle: Algorithms; concept or principle: Phase