[lemma=teacher | tag=NN] [tag=","] [lemma=negative] □
[lemma=teacher | tag=NN] [tag=","] [lemma=negative] [□]
[lemma=teacher | tag=NN] [tag=","] [lemma=negative] (□ | □)
In a sense , negative student behavior of this type gives us a clear indication that our classroom management is proving inadequate ( in at least this one case ) .