Motorcyclists with white helmets in a parking lot.
There is a motorcyclist with a white helmet.
Every motorcyclist in the parking lot has a white helmet.
exists s1 x1 x2 x3 x4.(a_topic(x1) & with(x1,x2) & in(x2,x3) & n_lot(x3) & of(x3,x4) & n_parking(x4) & n_helmet(x2) & a_white(s1) & Theme(s1,x2) & n_motorcyclist(x1))
exists p1 x1 s1 x2 x3.((x1 = x2) & with(x2,x3) & n_helmet(x3) & a_white(s1) & Theme(s1,x3) & n_motorcyclist(x2))