's a sit down and ponder affair 
(ROOT (S (VP (VBZ 's) (NP (DT a) (S (VP (VP (NN sit) (ADVP (RP down))) (CC and) (VP (VBP ponder)))) (NN affair)))))
(ROOT (S (VP (VBZ ) (NP (DT ) (S (VP (VP (NN ) (ADVP (RP ))) (CC ) (VP (VBP )))) (NN )))))