( ( The ( heating pad ) ) ( ( is ( ( a ( sealed ( plastic pouch ) ) ) ( containing ( sodium ( acetate solution ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN heating) (NN pad)) (VP (VBZ is) (NP (NP (DT a) (JJ sealed) (JJ plastic) (NN pouch)) (VP (VBG containing) (NP (NN sodium) (NN acetate) (NN solution))))) (. .)))
The heating pad is a sealed plastic pouch containing sodium acetate solution.
(ROOT (S (NP (PRP You)) (VP (MD can) (VP (VB find) (NP (NN sodium) (NN acetate)) (PP (IN in) (NP (DT a) (NN heat) (NN pack))))) (. .)))