3558
Four out of seven control grafts were patent with endothelial cell lining at six months , but three were occluded and one of the four grafts was still covered with a thrombus layer .
 Anatomy: grafts; Anatomy: endothelial cell; Anatomy: grafts; Anatomy: thrombus layer
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: grafts; Anatomy: endothelial cell; Anatomy: grafts; Anatomy: thrombus layer