106
The SnS/NS classification enables one to show how these classes contribute to the overall particle size distributions , even for a single powder type , and is useful for comparing different sources of powder as well as studying how the size/shape distributions of a powder might change over multiple recycling events .
 concept or principle: classification; concept or principle: particle size distributions; material: powder; material: powder; material: as; material: as; concept or principle: distributions; material: powder; concept or principle: recycling
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: classification, particle size distributions, powder, powder, as, as, distributions, powder, recycling 
Answer:
 concept or principle: classification; concept or principle: particle size distributions; material: powder; material: powder; material: as; material: as; concept or principle: distributions; material: powder; concept or principle: recycling