( ( On ( the equinoxes ) ) ( ( ( the angle ) ( of ( the sun ) ) ) ( ( ( is directly ) ( overhead ( at ( the equator ) ) ) ) . ) ) )
(ROOT (S (PP (IN On) (NP (DT the) (NNS equinoxes))) (NP (NP (DT the) (NN angle)) (PP (IN of) (NP (DT the) (NN sun)))) (VP (VBZ is) (ADVP (RB directly)) (NP (NP (NN overhead)) (PP (IN at) (NP (DT the) (NN equator))))) (. .)))
On the equinoxes the angle of the sun is 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))) (. .)))