12223
We present evidence that the development of thymic DC and of T-lineage cells is linked via a common precursor at an early stage of thymocyte development .
 ( cell type: thymic DC, None) , ( cell type: T-lineage cells, 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: thymic DC, None) , ( cell type: T-lineage cells, None) 