2691
However , the recently observed correlation linking the presence of these features with significantly enhanced mechanical strength in SLM 316L materials has driven a renewed interest and effort toward elucidating the mechanism ( s ) by which they are formed .
 machanical property: mechanical strength; manufacturing process: SLM; concept or principle: materials; concept or principle: mechanism; material: s
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: mechanical strength, SLM, materials, mechanism, s 
Answer:
 machanical property: mechanical strength; manufacturing process: SLM; concept or principle: materials; concept or principle: mechanism; material: s