1558
Two solid free form geometries designed by topology optimization are manufactured with this skeleton arc additive manufacturing process .
 concept or principle: geometries; engineering feature: designed; engineering feature: topology optimization; concept or principle: manufactured; manufacturing process: arc additive manufacturing
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: geometries, designed, topology optimization, manufactured, arc additive manufacturing 
Answer:
 concept or principle: geometries; engineering feature: designed; engineering feature: topology optimization; concept or principle: manufactured; manufacturing process: arc additive manufacturing