8876
Regulation of fas-ligand expression during activation-induced cell death in T lymphocytes via nuclear factor kappaB .
 nuclear factor kappaB, T lymphocytes
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 nuclear factor kappaB, T lymphocytes