tokens: All the tumors exhibited very low proliferative activity , fewer than 10% of the tumor cell nuclei being stained by the antibody MIB-1 ( Ki-67 antigen ) .
folded_tokens: all the tumors exhibited very low proliferative activity , fewer than 10% of the tumor cell nuclei being stained by the antibody mib-1 ( ki-67 antigen ) .
labels: O O O O O O O O O O O O O O B-cell_component I-cell_component I-cell_component O O O O B-protein_molecule I-protein_molecule O B-protein_molecule O O O