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)))))
The professors like how cool Big Bird is.
( ( The professors ) ( ( like ( how ( ( cool ( Big Bird ) ) is ) ) ) . ) )
(ROOT (S (NP (DT The) (NNS professors)) (VP (VBP like) (SBAR (WHADVP (WRB how)) (S (NP (JJ cool) (NNP Big) (NNP Bird)) (VP (VBZ is))))) (. .)))