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