1057
Discrete distribution of δ-phase and high-density precipitation of γ″-Ni3Nb were obtained .
 concept or principle: distribution; concept or principle: precipitation
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: distribution, precipitation 
Answer:
 concept or principle: distribution; concept or principle: precipitation