we're thinking about putting one of those in
( we ( 're ( thinking ( about ( ( putting ( one ( of those ) ) ) in ) ) ) ) )
(ROOT (S (NP (PRP we)) (VP (VBP 're) (VP (VBG thinking) (PP (IN about) (S (VP (VBG putting) (NP (NP (CD one)) (PP (IN of) (NP (DT those)))) (PP (IN in)))))))))
We plan to buy one of those tomorrow.
( We ( ( plan ( to ( buy ( one ( of ( those tomorrow ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP We)) (VP (VBP plan) (S (VP (TO to) (VP (VB buy) (NP (NP (CD one)) (PP (IN of) (NP (DT those) (NN tomorrow)))))))) (. .)))