2329
Here , we investigate the role of TSP - 1 in tumor - stroma reaction , which is mainly characterized by fibroblast activation to create a permissive microenvironment for tumor progression .
 Anatomy: tumor; Anatomy: stroma; Anatomy: fibroblast; Anatomy: tumor
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; Anatomy: stroma; Anatomy: fibroblast; Anatomy: tumor