tokens: The sequence located upstream of the J delta 1 segment corresponded to the previously reported germ-line sequence .
folded_tokens: the sequence located upstream of the j delta 1 segment corresponded to the previously reported germ-line sequence .
labels: O O O O O O B-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region O O O O O O O O