2136
Finally , increased spot density during processing is shown to increase the time of solidification , lowering temperature gradients and increasing the probability of equiaxed grain formation .
 machanical property: density; concept or principle: solidification; process parameter: temperature gradients; concept or principle: probability; concept or principle: equiaxed grain
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: density, solidification, temperature gradients, probability, equiaxed grain 
Answer:
 machanical property: density; concept or principle: solidification; process parameter: temperature gradients; concept or principle: probability; concept or principle: equiaxed grain