Loudly<br>She opened the back door and propped it. The dog didn't notice. A loud noise got her attention. It was a bird in the backyard. She ran outside to check it out.
The dog wasn't aware that the back door opened.
( z1 realize :polarity - :ARG0 ( z2 dog ) :ARG1 ( z3 open :ARG1 ( z4 door :mod ( z5 back ) ) ) )