( ( ( ( The Sun ) and ) other ) ( ( stars ( What ( is ( a star ) ) ) ) ? ) )
(ROOT (S (NP (NP (DT The) (NNP Sun)) (CC and) (NP (JJ other))) (VP (VBZ stars) (SBAR (WHNP (WP What)) (S (VP (VBZ is) (NP (DT a) (NN star)))))) (. ?)))
The Sun and other stars What is a star?
(ROOT (S (PP (IN From) (NP (NN earth))) (, ,) (NP (DT the) (NN sun)) (VP (VBZ appears) (NP (NN brighter)) (PP (IN than) (NP (DT any) (JJ other) (NN star))) (SBAR (IN because) (S (NP (DT the) (NN sun)) (VP (VBZ is) (NP (DT the) (JJS closest) (NN star))))))))