Each year, we help thousands of people who face tremendous obstacles.
( ( Each year ) ( , ( we ( ( help ( thousands ( of ( people ( who ( face ( tremendous obstacles ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (NP (DT Each) (NN year)) (, ,) (NP (PRP we)) (VP (VBP help) (NP (NP (NNS thousands)) (PP (IN of) (NP (NP (NNS people)) (SBAR (WHNP (WP who)) (S (VP (VBP face) (NP (JJ tremendous) (NNS obstacles))))))))) (. .)))
The obstacles they face may be poverty, mental illness, or physical disability.
( ( ( The obstacles ) ( they face ) ) ( ( may ( be ( ( ( ( ( poverty , ) ( mental illness ) ) , ) or ) ( physical disability ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NNS obstacles)) (SBAR (S (NP (PRP they)) (VP (VBP face))))) (VP (MD may) (VP (VB be) (NP (NP (NN poverty)) (, ,) (NP (JJ mental) (NN illness)) (, ,) (CC or) (NP (JJ physical) (NN disability))))) (. .)))