thirteen conversations about one thing lays out a narrative puzzle that interweaves individual stories , and , like a mobius strip , elliptically loops back to where it began . 
(ROOT (S (NP (NP (CD thirteen) (NNS conversations)) (PP (IN about) (NP (CD one) (NN thing)))) (VP (VBZ lays) (PRT (RP out)) (NP (NP (DT a) (JJ narrative) (NN puzzle)) (SBAR (WHNP (WDT that)) (S (VP (VP (VBZ interweaves) (NP (JJ individual) (NNS stories))) (, ,) (CC and) (, ,) (VP (PP (IN like) (NP (DT a) (NN mobius) (NN strip))) (, ,) (ADVP (RB elliptically)) (VP (VBZ loops) (ADVP (RB back) (PP (IN to) (SBAR (WHADVP (WRB where)) (S (NP (PRP it)) (VP (VBD began))))))))))))) (. .)))
(ROOT (S (NP (NP (CD ) (NNS )) (PP (IN ) (NP (CD ) (NN )))) (VP (VBZ ) (PRT (RP )) (NP (NP (DT ) (JJ ) (NN )) (SBAR (WHNP (WDT )) (S (VP (VP (VBZ ) (NP (JJ ) (NNS ))) (, ) (CC ) (, ) (VP (PP (IN ) (NP (DT ) (NN ) (NN ))) (, ) (ADVP (RB )) (VP (VBZ ) (ADVP (RB ) (PP (IN ) (SBAR (WHADVP (WRB )) (S (NP (PRP )) (VP (VBD ))))))))))))) (. )))