She leaned back in her chair.
( She ( ( ( leaned back ) ( in ( her chair ) ) ) . ) )
(ROOT (S (NP (PRP She)) (VP (VBD leaned) (ADVP (RB back)) (PP (IN in) (NP (PRP$ her) (NN chair)))) (. .)))
She stood next to a chair. 
( She ( ( ( stood next ) ( to ( a chair ) ) ) . ) )
(ROOT (S (NP (PRP She)) (VP (VBD stood) (ADVP (JJ next)) (PP (TO to) (NP (DT a) (NN chair)))) (. .)))