( ( A ( light-weight ( instrument package ) ) ) ( ( ( carried aloft ) ( by ( a ( weather balloon ) ) ) ) ; ) )
(ROOT (S (NP (DT A) (JJ light-weight) (NN instrument) (NN package)) (VP (VBD carried) (ADVP (RB aloft)) (PP (IN by) (NP (DT a) (NN weather) (NN balloon)))) (: ;)))
A light-weight instrument package carried aloft by a weather balloon;
(ROOT (S (NP (NNP Birds)) (VP (VBP need) (NP (DT a) (JJ light-weight) (NN body)) (PP (IN for)) (S (VP (TO to) (VP (VB stay) (ADVP (RB aloft)))))) (. .)))