some of the professors i think imitate Big Bird
( ( some ( of ( the ( professors i ) ) ) ) ( think ( imitate ( Big Bird ) ) ) )
(ROOT (S (NP (NP (DT some)) (PP (IN of) (NP (DT the) (FW professors) (FW i)))) (VP (VBP think) (NP (NNP imitate) (NNP Big) (NNP Bird)))))
There are some professors that re an awful lot like Big Bird.
( There ( ( are ( ( some professors ) ( that ( re ( ( an ( awful lot ) ) ( like ( Big Bird ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (EX There)) (VP (VBP are) (NP (NP (DT some) (NNS professors)) (SBAR (WHNP (WDT that)) (S (VP (VBP re) (NP (NP (DT an) (JJ awful) (NN lot)) (PP (IN like) (NP (NNP Big) (NNP Bird))))))))) (. .)))