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Volume and sphericity distribution of defects are studied .
 concept or principle: Volume; concept or principle: distribution; concept or principle: defects
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: Volume, distribution, defects 
Answer:
 concept or principle: Volume; concept or principle: distribution; concept or principle: defects