6558
The mean grain size increases from 56 μm ( at the top of the rod ) to 159 μm ( at the bottom ) , and is accompanied by a decrease in the γ-fcc phase fraction .
 machanical property: grain size; machine or equipment: rod; concept or principle: phase fraction
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: grain size, rod, phase fraction 
Answer:
 machanical property: grain size; machine or equipment: rod; concept or principle: phase fraction