lady smoking a cigarette walking
The lady is not a smoker.
Someone who is not a smoker would not be smoking a cigarette
all x1 x2.((n_walking(x1) & of(x1,x2) & n_cigarette(x2)) -> exists x3 x4.(a_topic(x3) & for(x3,x1) & n_smoking(x3) & of(x3,x4) & n_lady(x4)))
exists x1.(n_lady(x1) & -exists p1 x2.((x1 = x2) & n_smoker(x2)))