( and ( ( ( are therefore ) ( said ( to ( precede themselves ) ) ) ) . ) )
(ROOT (S (NP (NNP and)) (VP (VBP are) (ADVP (RB therefore)) (VP (VBN said) (S (VP (TO to) (VP (VB precede) (NP (PRP themselves))))))) (. .)))
and are therefore said to precede themselves.
(ROOT (S (NP (NNP Earth)) (VP (VBZ makes) (NP (DT a) (JJ complete) (NN revolution)) (NP (ADVP (IN around) (NP (DT the) (NN sun)) (PP (IN about) (ADVP (RB once)))) (DT every) (NN year))) (. .)))