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Using an avidin -biotin peroxidase detection system , we found a nuclear staining in 14.6 +/- 3.7% (mean +/- SEM, N = 27) of pregnancy lymphocytes , while only 0.47 +/- 0.33% (mean +/- SEM, N = 15) of nonpregnancy lymphocytes reacted with the antibody.
 cell line: lymphocytes; cell type: nonpregnancy lymphocytes; cell line: lymphocytes; protein: -biotin peroxidase; protein: avidin; cell type: pregnancy lymphocytes
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 cell line: lymphocytes; cell type: nonpregnancy lymphocytes; cell line: lymphocytes; protein: -biotin peroxidase; protein: avidin; cell type: pregnancy lymphocytes