( ( ( Pack ( ( a can ) ( of Sterno ) ) ) ( to ( heat food ) ) ) . )
(ROOT (S (VP (VB Pack) (NP (NP (DT a) (NN can)) (PP (IN of) (NP (NNP Sterno)))) (S (VP (TO to) (VP (VB heat) (NP (NN food)))))) (. .)))
Pack a can of Sterno to heat food.
(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))))) (. .)))