( What ( ( are ( ( the ( ideal ( weather conditions ) ) ) ( for ( optimal sky-observing ) ) ) ) ? ) )
(ROOT (SBARQ (WHNP (WP What)) (SQ (VBP are) (NP (NP (DT the) (JJ ideal) (NN weather) (NNS conditions)) (PP (IN for) (NP (JJ optimal) (NN sky-observing))))) (. ?)))
What are the ideal weather conditions for optimal sky-observing?
(ROOT (S (NP (NN Temperature) (CC and) (NN sky) (NNS conditions)) (VP (VBP are) (ADVP (DT both)) (VP (VBN used) (S (VP (TO to) (VP (VB describe) (NP (NN weather))))))) (. .)))