1383
Each facet is part of the boundary between the interior and the exterior of the object and each triangle facet must share two vertices with each of its adjacent triangles .
 concept or principle: facet; engineering feature: boundary; concept or principle: facet; process parameter: vertices; concept or principle: adjacent triangles
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:
 concept or principle: facet; engineering feature: boundary; concept or principle: facet; process parameter: vertices; concept or principle: adjacent triangles