a chain of relationships that come full circle to end on a positive ( if tragic ) note 
(ROOT (NP (NP (NP (DT a) (NN chain)) (PP (IN of) (NP (NNS relationships)))) (SBAR (WHNP (WDT that)) (S (VP (VBP come) (NP (JJ full) (NN circle)) (S (VP (TO to) (VP (VB end) (PP (IN on) (NP (DT a) (ADJP (JJ positive) (-LRB- -LRB-) (SBAR (IN if) (FRAG (ADJP (JJ tragic)))) (-RRB- -RRB-)) (NN note)))))))))))
(ROOT (NP (NP (NP (DT ) (NN )) (PP (IN ) (NP (NNS )))) (SBAR (WHNP (WDT )) (S (VP (VBP ) (NP (JJ ) (NN )) (S (VP (TO ) (VP (VB ) (PP (IN ) (NP (DT ) (ADJP (JJ ) (-LRB- ) (SBAR (IN ) (FRAG (ADJP (JJ )))) (-RRB- )) (NN )))))))))))