( ( Can ( be ( ( used ( as ( a ( heat pack ) ) ) ) too ) ) ) . )
(ROOT (S (VP (MD Can) (VP (VB be) (VP (VBN used) (PP (IN as) (NP (DT a) (NN heat) (NN pack))) (ADVP (RB too))))) (. .)))
Can be used as a heat pack too.
(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))))) (. .)))