3341
High local stresses along the peripheries of pores caused crack nucleation , and mismatches in deformation behavior between NbC precipitates and the surrounding matrix led to local stress gradients that induced crack nucleation and decohesion at precipitate/matrix interfaces .
 machanical property: pores; concept or principle: nucleation; concept or principle: deformation; material: precipitates; application: led; machanical property: stress; concept or principle: nucleation
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: pores, nucleation, deformation, precipitates, led, stress, nucleation 
Answer:
 machanical property: pores; concept or principle: nucleation; concept or principle: deformation; material: precipitates; application: led; machanical property: stress; concept or principle: nucleation