511
When two or more weld beads are deposited on each edge , the vertices of the rib-web structure may suffer from underfilling .
 concept or principle: weld beads; process parameter: vertices; concept or principle: structure
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: weld beads, vertices, structure 
Answer:
 concept or principle: weld beads; process parameter: vertices; concept or principle: structure