( ( At ( the equinoxes ) ) ( ( the sun ) ( ( ( is directly ) ( over ( the equator ) ) ) . ) ) )
(ROOT (S (PP (IN At) (NP (DT the) (NNS equinoxes))) (NP (DT the) (NN sun)) (VP (VBZ is) (ADVP (RB directly)) (PP (IN over) (NP (DT the) (NN equator)))) (. .)))
At the equinoxes the sun is directly over 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))) (. .)))