tokens: Thymic dendritic cells ( DC ) mediate negative selection at a relatively late stage of the T-cell developmental pathway .
folded_tokens: thymic dendritic cells ( dc ) mediate negative selection at a relatively late stage of the t-cell developmental pathway .
labels: B-cell_type I-cell_type I-cell_type O B-cell_type O O O O O O O O O O O B-other_name I-other_name I-other_name O