80596
Tantalite has the same mineral structure as columbite ( Fe , Mn ) ( Ta , Nb ) O ; when there is more tantalum than niobium it is called tantalite and when there is more niobium than tantalum is it called columbite ( or niobite ) .
 O
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 O