The news comes as the owners of Kilroot announced plans to install clean-up equipment at the plant near Carrickfergus at a cost of Â£35 million.
The owners brush their hair
The owners might brush their hair, but they might not brush their hair making this statement neither correct nor incorrect. Plus it's unrelated to the topic sentence. I am not sure why this statement fooled the model, and not the other things I submitted. Maybe something about the words I used knocked it off. 
( z1 brush :ARG0 ( z2 person :ARG0-of ( z3 own ) ) :ARG1 ( z4 hair :part-of z2 ) )