( ( ( ( Draw ( ( a diagram ) ( of ( the Sun ) ) ) ) , ) ( ( ( ( the Moon ) , ) and ) ( ( the Earth ) ( at ( Spring tide ) ) ) ) ) . )
(ROOT (S (VP (VB Draw) (NP (NP (DT a) (NN diagram)) (PP (IN of) (NP (DT the) (NNP Sun)))) (, ,) (NP (NP (DT the) (NN Moon)) (, ,) (CC and) (NP (NP (DT the) (NN Earth)) (PP (IN at) (NP (NNP Spring) (NN tide)))))) (. .)))
Draw a diagram of the Sun, the Moon, and the Earth at Spring tide.
(ROOT (S (NP (NNP Spring) (NNS tides)) (VP (VBP are) (VP (VBN created) (SBAR (WHADVP (WRB when)) (S (NP (NP (DT the) (NN sun)) (CC and) (NP (NP (NN moon) (POS 's)) (NNS tides))) (VP (VBP match)))))) (. .)))