8723
In this study , we used genetic and biochemical approaches to examine the PHD1 - PHD2 region of the Caenorhabditis elegans ortholog of AF10 , zinc finger protein 1 ( ZFP - 1 ) .
 Chemical: zinc
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: zinc