tokens: Of the 5 virus carriers , 4 were infected with type A and 1 with type B EBV .
folded_tokens: of the 5 virus carriers , 4 were infected with type a and 1 with type b ebv .
labels: O O O B-multi_cell I-multi_cell O O O O O B-virus I-virus O O O B-virus I-virus I-virus O