tokens: All human adenoviruses transform rodent cells in vitro , but only cells transformed by serotypes belonging to subgroups A ( Ad12 ) and B ( Ad3 ) are tumorigenic for immunocompetent animals .
folded_tokens: all human adenoviruses transform rodent cells in vitro , but only cells transformed by serotypes belonging to subgroups a ( ad12 ) and b ( ad3 ) are tumorigenic for immunocompetent animals .
labels: O O B-virus O B-cell_type I-cell_type O O O O O O O O O O O O O O B-virus O O O O B-virus O O O O B-multi_cell I-multi_cell O