in the end , you feel alive - which is what they did 
(ROOT (S (PP (IN in) (NP (DT the) (NN end))) (, ,) (NP (PRP you)) (VP (VBP feel) (ADJP (JJ alive)) (, -) (SBAR (WHNP (WDT which)) (S (VP (VBZ is) (SBAR (WHNP (WP what)) (S (NP (PRP they)) (VP (VBD did))))))))))
(ROOT (S (PP (IN ) (NP (DT ) (NN ))) (, ) (NP (PRP )) (VP (VBP ) (ADJP (JJ )) (, ) (SBAR (WHNP (WDT )) (S (VP (VBZ ) (SBAR (WHNP (WP )) (S (NP (PRP )) (VP (VBD ))))))))))