tokens: All of the tumors exhibited typical morphology , were limited to the ovary ( stage I ) , and 7 cases followed a benign clinical course .
folded_tokens: all of the tumors exhibited typical morphology , were limited to the ovary ( stage i ) , and 7 cases followed a benign clinical course .
labels: O O O O O O O O O O O O B-body_part O O O O O O O O O O B-other_name I-other_name I-other_name O