1069
determine the minimum self-supporting angle in 2D .
 engineering feature: self-supporting angle; concept or principle: 2D
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:
 engineering feature: self-supporting angle; concept or principle: 2D