tokens: Human monoblastic leukemia U937 cells are induced to differentiate into monocytes and macrophages by various agents .
folded_tokens: human monoblastic leukemia u937 cells are induced to differentiate into monocytes and macrophages by various agents .
labels: B-cell_line I-cell_line I-cell_line I-cell_line I-cell_line O O O O O B-cell_type O B-cell_type O O O O