( ( ( The ( pungent smell ) ) ( of ( ( the ( yellow ( , ( toffee ( colored substance ) ) ) ) ) ( in ( the bag ) ) ) ) ) ( ( fills ( the air ) ) . ) )
(ROOT (S (NP (NP (DT The) (ADJP (JJ pungent)) (NN smell)) (PP (IN of) (NP (NP (DT the) (JJ yellow) (, ,) (JJ toffee) (JJ colored) (NN substance)) (PP (IN in) (NP (DT the) (NN bag)))))) (VP (VBZ fills) (NP (DT the) (NN air))) (. .)))
The pungent smell of the yellow, toffee colored substance in the bag fills the air.
(ROOT (S (SBAR (IN If) (S (NP (DT a) (NN substance)) (VP (VBZ does) (RB not) (VP (VB release) (NP (NNS molecules)) (PP (IN into) (NP (NP (DT the) (NN air)) (PP (IN from) (NP (PRP$ its) (NN surface))))))))) (, ,) (NP (PRP it)) (VP (MD will) (RB not) (VP (VB have) (NP (DT a) (NN smell)))) (. .)))
If a substance does not release molecules into the air from its surface, it will not have a smell.