1037
A transgenic double - reporter strategy allowed us to demonstrate definitively that tumor bone marrow - derived endothelial cells arise by transdifferentiation of marrow progenitors rather than by cell fusion .
 Anatomy: tumor bone marrow - derived endothelial cells; Anatomy: marrow progenitors; Anatomy: cell
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Anatomy 
Text: {0} 
Answer:
 Anatomy: tumor bone marrow - derived endothelial cells; Anatomy: marrow progenitors; Anatomy: cell