23233
This notation was proposed in 1991 with the discovery of fullerene cages ( endohedral fullerenes ) , which can trap atoms such as La to form , for example , La@C or La@C .
 La, La@C, La@C
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 La, La@C, La@C