10304
The prolactin receptor , a member of the hematopoietin/cytokine receptor superfamily , is ubiquitously expressed by cells in the immune system .
 protein: hematopoietin/cytokine receptor superfamily; protein: prolactin receptor
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
 Entities: hematopoietin/cytokine receptor superfamily, prolactin receptor 
Answer:
 protein: hematopoietin/cytokine receptor superfamily; protein: prolactin receptor