4063
In contrast, Spi-B is expressed exclusively in lymphoid cells and can be detected in early fetal thymus and spleen .
 cell type: lymphoid cells; protein: Spi-B
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: lymphoid cells, Spi-B 
Answer:
 cell type: lymphoid cells; protein: Spi-B