6015
For example dendritic cells ( DC ) can be found in colonies of GM-CSF-responsive bone marrow cells , and under experimental conditions are routinely expanded as a population in vitro from GM-CSF-responsive progenitor cells .
 ( cell type: dendritic cells, None) , ( cell type: GM-CSF-responsive bone marrow cells, None) , ( cell type: GM-CSF-responsive progenitor cells, None) , ( cell type: DC, 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: dendritic cells, None) , ( cell type: GM-CSF-responsive bone marrow cells, None) , ( cell type: GM-CSF-responsive progenitor cells, None) , ( cell type: DC, None) 