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The following sentence, re-worded to have AT LEAST five fewer words:
CASLPA held a press conference on Parliament Hill October 1 that alerted the public to the fact that a noisy classroom can affect a child's ability to learn as well as impact on teacher's vocal health.
What is: (eg.)
On October 1, CASLPA held a press conference on Parliament Hill to raise awareness about noisy classrooms and the risks they pose for child learning and teachers’ vocal health.