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Some of the most detrimental defects produced during SLM processing are lack of fusion ( LoF ) defects , which are frequently found to be in excess of 100 μm in size , thus these defects are of critical importance to detect and remove .
 concept or principle: defects; manufacturing process: SLM; concept or principle: fusion; concept or principle: defects; material: be; 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: defects, SLM, fusion, defects, be, defects 
Answer:
 concept or principle: defects; manufacturing process: SLM; concept or principle: fusion; concept or principle: defects; material: be; concept or principle: defects