Many of us also from time to time talk about a  fourth estate 'the media.
( ( Many ( of us ) ) ( ( ( also ( ( from time ) ( to time ) ) ) ( talk ( about ( ( ( a ( fourth estate ) ) ` ) ( the media ) ) ) ) ) . ) )
(ROOT (S (NP (NP (JJ Many)) (PP (IN of) (NP (PRP us)))) (VP (ADVP (ADVP (RB also)) (PP (IN from) (NP (NN time)) (PP (TO to) (NP (NN time))))) (VBP talk) (PP (IN about) (NP (NP (DT a) (JJ fourth) (NN estate)) (`` `) (NP (DT the) (NNS media))))) (. .)))
There are a total of four estates.
( There ( ( are ( ( a total ) ( of ( four estates ) ) ) ) . ) )
(ROOT (S (NP (EX There)) (VP (VBP are) (NP (NP (DT a) (NN total)) (PP (IN of) (NP (CD four) (NNS estates))))) (. .)))