Her son found her sitting on the floor yesterday evening and called 911.
 the patient was found on the ground
(ROOT (S (NP (PRP$ Her) (NN son)) (VP (VBD found) (S (S (NP (PRP$ her)) (VP (VBG sitting) (PP (IN on) (NP (DT the) (NN floor))) (NP (NN yesterday) (NN evening)))) (CC and) (VP (VBN called) (S (NP (CD 911)))))) (. .)))
(ROOT (S (NP (DT the) (NN patient)) (VP (VBD was) (VP (VBN found) (PP (IN on) (NP (DT the) (NN ground)))))))
( ( Her son ) ( ( found ( ( ( her ( ( sitting ( on ( the floor ) ) ) ( yesterday evening ) ) ) and ) ( called 911 ) ) ) . ) )
( ( the patient ) ( was ( found ( on ( the ground ) ) ) ) )