( ( Robert Boyle ) ( ( had ( ( ( formulated ( this concept ) ) ( as early ) ) ( as 1661 ) ) ) . ) )
(ROOT (S (NP (NNP Robert) (NNP Boyle)) (VP (VBD had) (VP (VBN formulated) (NP (DT this) (NN concept)) (ADVP (RB as) (RB early)) (PP (IN as) (NP (CD 1661))))) (. .)))
Robert Boyle had formulated this concept as early as 1661.
(ROOT (S (NP (NP (CD One)) (PP (IN of) (NP (DT the) (JJS earliest) (NN air) (NNS pumps)))) (VP (VBD was) (VP (VBN made) (PP (IN by) (NP (JJ robert) (NN boyle))))) (. .)))