dog-paddle in the mediocre end of the pool 
(ROOT (NP (NP (NN dog) (HYPH -) (NN paddle)) (PP (IN in) (NP (NP (DT the) (JJ mediocre) (NN end)) (PP (IN of) (NP (DT the) (NN pool)))))))
(ROOT (NP (NP (NN ) (HYPH ) (NN )) (PP (IN ) (NP (NP (DT ) (JJ ) (NN )) (PP (IN ) (NP (DT ) (NN )))))))