7294
By examining in vitro-differentiated embryonic stem cells , we showed previously that in the absence of GATA-1 , committed erythroid precursors fail to complete maturation and instead undergo apoptosis .
 cell line: vitro-differentiated embryonic stem cells; cell line: committed erythroid precursors; protein: GATA-1
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: vitro-differentiated embryonic stem cells, committed erythroid precursors, GATA-1 
Answer:
 cell line: vitro-differentiated embryonic stem cells; cell line: committed erythroid precursors; protein: GATA-1