What type of details about karl kempf can be gathered from the following bio? Bio: karl-heinz kempf -lrb- 2 february 1920 -- 3 september 1944 -rrb- was a german '' luftwaffe '' fighter ace and recipient of the knight 's cross of the iron cross during world war ii . the knight 's cross of the iron cross was awarded to recognise extreme battlefield bravery or successful military leadership .
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