This is a 80 year old who presented to the ED with abdominal pain.
 The patient sought care in the emergency department 
(ROOT (S (NP (DT This)) (VP (VBZ is) (NP (NP (DT a) (ADJP (CD 80) (NN year) (JJ old))) (SBAR (WHNP (WP who)) (S (VP (VBD presented) (PP (TO to) (NP (DT the) (NN ED))) (PP (IN with) (NP (JJ abdominal) (NN pain)))))))) (. .)))
(ROOT (S (NP (DT The) (NN patient)) (VP (VBD sought) (NP (NN care)) (PP (IN in) (NP (DT the) (NN emergency) (NN department))))))
( This ( ( is ( ( a ( 80 ( year old ) ) ) ( who ( ( presented ( to ( the ED ) ) ) ( with ( abdominal pain ) ) ) ) ) ) . ) )
( ( The patient ) ( ( sought care ) ( in ( the ( emergency department ) ) ) ) )