13408
Conversely, classic HD ( CHD ) is heterogeneous because the tumor cells of a fraction of CHD display the BCL-6 (-)/ syn-1 (+) phenotype of post-GC B-cells, whereas another fraction of CHD is constituted by a mixture of tumor cells reflecting the GC ( BCL-6 (+)/ syn-1 (-)) or post-GC ( BCL-6 (-)/ syn-1 (+)) phenotypes .
 ( protein: syn-1, None) , ( protein: syn-1, None) , ( cell type: tumor cells, None) , ( protein: BCL-6, None) , ( protein: syn-1, None) , ( cell type: tumor cells, None) , ( protein: BCL-6, None) , ( protein: BCL-6, None) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: RNA,cell type,protein,cell line,DNA, Arguments type: . 
Text: {0} 
Answer:
 ( protein: syn-1, None) , ( protein: syn-1, None) , ( cell type: tumor cells, None) , ( protein: BCL-6, None) , ( protein: syn-1, None) , ( cell type: tumor cells, None) , ( protein: BCL-6, None) , ( protein: BCL-6, None) 