6066
By comparing the actions of the VDR , a relatively well - understood and characterized protein , with those of other transcription factors , we aim to build a realistic positioning of vitamin D signaling in the context of other intracellular signaling systems .
 Chemical: vitamin D
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: vitamin D