1420
Sequence analysis of the isolated genomic clone revealed that the DNA binding domain of this orphan receptor is most homologous to the human TR2 receptor .
 GENE: human TR2 receptor
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
 Entities: human TR2 receptor 
Answer:
 GENE: human TR2 receptor