 Most menu prices include taxes and a service charge, but it's customary to leave a tip if you were served satisfactorily.
( ( ( ( ( ( Most ( menu prices ) ) ( include ( ( taxes and ) ( a ( service charge ) ) ) ) ) , ) but ) ( it ( 's ( customary ( to ( ( leave ( a tip ) ) ( if ( you ( were ( served satisfactorily ) ) ) ) ) ) ) ) ) ) . )
(ROOT (S (S (NP (JJS Most) (NN menu) (NNS prices)) (VP (VBP include) (NP (NP (NNS taxes)) (CC and) (NP (DT a) (NN service) (NN charge))))) (, ,) (CC but) (S (NP (PRP it)) (VP (VBZ 's) (ADJP (JJ customary) (S (VP (TO to) (VP (VB leave) (NP (DT a) (NN tip)) (SBAR (IN if) (S (NP (PRP you)) (VP (VBD were) (VP (VBN served) (ADVP (RB satisfactorily)))))))))))) (. .)))
Prices on the menu include taxes, but customers decide whether or not to tip.
( ( ( ( ( ( Prices ( on ( the menu ) ) ) ( include taxes ) ) , ) but ) ( customers ( decide ( ( ( whether or ) not ) ( to tip ) ) ) ) ) . )
(ROOT (S (S (NP (NP (NNS Prices)) (PP (IN on) (NP (DT the) (NN menu)))) (VP (VBP include) (NP (NNS taxes)))) (, ,) (CC but) (S (NP (NNS customers)) (VP (VBP decide) (PP (PP (IN whether)) (CC or) (RB not) (PP (TO to) (NP (NN tip)))))) (. .)))