( Sun ( directly ( ( ( overhead ( on equator ) ) ( at ( ( two times ) ( of ( ( year , ) ( the ( March ( and ( September equinoxes ) ) ) ) ) ) ) ) ) . ) ) )
(ROOT (S (NP (NNP Sun)) (ADVP (RB directly)) (VP (VBD overhead) (PP (IN on) (NP (NN equator))) (PP (IN at) (NP (NP (CD two) (NNS times)) (PP (IN of) (NP (NP (NN year)) (, ,) (NP (DT the) (NNP March) (CC and) (NNP September) (NNS equinoxes))))))) (. .)))
Sun directly overhead on equator at two times of year, the March and September equinoxes .
(ROOT (S (NP (DT The) (NN sun)) (VP (VBZ is) (ADVP (RB directly)) (PP (IN over) (NP (DT the) (NN equator))) (PP (IN during))) (. .)))