1041
By ruling out cell fusion , we clearly demonstrate the existence of an adult hemangioblast , but the differentiation of marrow stem cells toward the endothelial lineage is an extremely rare event .
 Anatomy: cell; Anatomy: hemangioblast; Anatomy: marrow stem cells; Anatomy: endothelial lineage
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: cell; Anatomy: hemangioblast; Anatomy: marrow stem cells; Anatomy: endothelial lineage