( ( Just ( like ( the ( Vernal Equinox ) ) ) ) ( , ( ( the Sun ) ( ( is ( ( going directly ) ( overhead ( at ( the Equator ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (RB Just) (IN like) (NP (DT the) (NNP Vernal) (NNP Equinox))) (, ,) (NP (DT the) (NNP Sun)) (VP (VBZ is) (VP (VBG going) (ADVP (RB directly)) (PP (ADVP (RB overhead)) (IN at) (NP (DT the) (NNP Equator))))) (. .)))
Just like the Vernal Equinox, the Sun is going directly overhead at the Equator.
(ROOT (S (NP (DT The) (NN sun)) (VP (VBZ is) (ADVP (RB directly)) (PP (IN over) (NP (DT the) (NN equator))) (PP (IN during))) (. .)))