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when was ultimate frisbee invented	0.55	0.5	625	34	50
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history of ultimate frisbee	1.58	0.8	4976	27	60
when was the first frisbee made	0.41	0.7	8548	31	98
how is ultimate frisbee played	0.24	0.5	3190	30	5
how did ultimate frisbee start	1.08	0.9	3667	30	43
ultimate frisbee sports history	1.74	1	9706	31	92
who formed the first ultimate frisbee team	0.7	0.2	5199	42	23
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ultimate frisbee history of the sport	0.5	0.5	1335	37	75
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ultimate frisbee game play	0.03	0.4	4226	26	90
ultimate frisbee video game	0.37	0.7	9791	27	37
when did the frisbee come out	0.28	0.3	9856	29	54

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