great fun both for sports aficionados and for ordinary louts whose idea of exercise is climbing the steps of a stadium-seat megaplex . 
(ROOT (NP (NP (JJ great) (NN fun)) (PP (CC both) (IN for) (NP (NNS sports) (NNS aficionados)) (CC and) (PP (IN for) (NP (NP (JJ ordinary) (NNS louts)) (SBAR (WHNP (WHNP (WP$ whose) (NN idea)) (PP (IN of) (NP (NN exercise)))) (S (VP (VBZ is) (S (VP (VBG climbing) (NP (NP (DT the) (NNS steps)) (PP (IN of) (NP (DT a) (NML (NN stadium) (HYPH -) (NN seat)) (NN megaplex)))))))))))) (. .)))
(ROOT (NP (NP (JJ ) (NN )) (PP (CC ) (IN ) (NP (NNS ) (NNS )) (CC ) (PP (IN ) (NP (NP (JJ ) (NNS )) (SBAR (WHNP (WHNP (WP$ ) (NN )) (PP (IN ) (NP (NN )))) (S (VP (VBZ ) (S (VP (VBG ) (NP (NP (DT ) (NNS )) (PP (IN ) (NP (DT ) (NML (NN ) (HYPH ) (NN )) (NN )))))))))))) (. )))