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Here the effects of these causative factors on the heterogeneous grain growth during multi-layer laser deposition of Inconel 718 are examined by a Monte Carlo method based grain growth model .
 concept or principle: heterogeneous; concept or principle: grain growth; enabling technology: laser; concept or principle: deposition; material: Inconel 718; concept or principle: grain growth
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: heterogeneous, grain growth, laser, deposition, Inconel 718, grain growth 
Answer:
 concept or principle: heterogeneous; concept or principle: grain growth; enabling technology: laser; concept or principle: deposition; material: Inconel 718; concept or principle: grain growth