1221
Parts are single phase with inter-cellular regions enriched in Mn and Ni .
 phase, Mn, Ni
Please list all entity words in the text that fit the category. Output format is "word1, 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} 
Answer:
 phase, Mn, Ni