[tag=NN] [word=measures] [lemma=","] [lemma=leave] □
[tag=NN] [word=measures] [lemma=","] [lemma=leave] [□]
[tag=NN] [word=measures] [lemma=","] [lemma=leave] □+
The editorial charges that Chertoff has undermined homeland security by ignoring chemical plant safety measures , leaving them vulnerable targets for terrorist attacks .