1900
2D results sometimes are quite useless in practice since the broadened design freedom exists in 3D , not 2D .
 concept or principle: 2D; concept or principle: design freedom; concept or principle: 3D; concept or principle: 2D
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: 2D, design freedom, 3D, 2D 
Answer:
 concept or principle: 2D; concept or principle: design freedom; concept or principle: 3D; concept or principle: 2D