( ( In ( most camps ) ) ( , ( ( ( the supply ) ( of ( clean ( drinking water ) ) ) ) ( ( was low ) . ) ) ) )
(ROOT (S (PP (IN In) (NP (JJS most) (NNS camps))) (, ,) (NP (NP (DT the) (NN supply)) (PP (IN of) (NP (JJ clean) (NN drinking) (NN water)))) (VP (VBD was) (ADJP (JJ low))) (. .)))
In most camps, the supply of clean drinking water was low.
(ROOT (S (NP (NP (QP (IN At) (JJS least) (CD 20)) (NN percent)) (PP (IN of) (NP (NP (DT the) (NN world) (POS 's)) (NNS people)))) (VP (VBP do) (RB not) (VP (VB have) (NP (NP (DT a) (JJ ready) (NN supply)) (PP (IN of) (NP (JJ clean) (NN drinking) (NN water)))))) (. .)))