1796
One of these is the shaping of curved and organic surfaces by the use of T-splines and more recently polygonal non-uniform rational B-spline .
 manufacturing process: shaping; concept or principle: surfaces; engineering feature: T-splines; concept or principle: non-uniform rational B-spline
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:
 manufacturing process: shaping; concept or principle: surfaces; engineering feature: T-splines; concept or principle: non-uniform rational B-spline