swims in mediocrity , sticking its head up for a breath of fresh air now and then . 
(ROOT (S (VP (VBZ swims) (PP (IN in) (NP (NN mediocrity))) (, ,) (S (VP (VBG sticking) (NP (PRP$ its) (NN head)) (PRT (RP up)) (PP (IN for) (NP (NP (DT a) (NN breath)) (PP (IN of) (NP (JJ fresh) (NN air))))) (ADVP (RB now) (CC and) (RB then))))) (. .)))
(ROOT (S (VP (VBZ ) (PP (IN ) (NP (NN ))) (, ) (S (VP (VBG ) (NP (PRP$ ) (NN )) (PRT (RP )) (PP (IN ) (NP (NP (DT ) (NN )) (PP (IN ) (NP (JJ ) (NN ))))) (ADVP (RB ) (CC ) (RB ))))) (. )))