9036
RESULTS: All the tumors exhibited strong expression of vimentin , but most other antigens (including smooth muscle actin ) were expressed infrequently by a minority of tumor cells or not at all.
 ( cell type: tumor cells, None) , ( protein: smooth muscle actin, None) , ( protein: vimentin, 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:
 ( cell type: tumor cells, None) , ( protein: smooth muscle actin, None) , ( protein: vimentin, None) 