his father managed the rink for twenty years
his father manage the rink for twenty year
det:poss n v det:art n prep det:num n
his father managed the rink for twenty years .
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h i s WORD_BOUNDARY f a t h e r WORD_BOUNDARY m a n a g e d WORD_BOUNDARY t h e WORD_BOUNDARY r i n k WORD_BOUNDARY f o r WORD_BOUNDARY t w e n t y WORD_BOUNDARY y e a r s WORD_BOUNDARY