( ( ( ( ( Improperly ( cooked ( ( poultry ( , untreated ) ) water ) ) ) , ) and ) ( ( unpasteurized milk ) ( are ( ( the ( main sources ) ) ( of infection ) ) ) ) ) . )
(ROOT (S (S (NP (NNP Improperly)) (VP (VBD cooked) (NP (ADJP (NNP poultry) (, ,) (JJ untreated)) (NN water)))) (, ,) (CC and) (S (NP (JJ unpasteurized) (NN milk)) (VP (VBP are) (NP (NP (DT the) (JJ main) (NNS sources)) (PP (IN of) (NP (NN infection)))))) (. .)))
Improperly cooked poultry, untreated water, and unpasteurized milk are the main sources of infection.
(ROOT (S (NP (NNP Water)) (VP (VBZ is) (NP (NP (DT the) (JJ main) (NN component)) (PP (IN of) (NP (NN milk))))) (. .)))