A man is bobbing for apples in a plastic bucket.
A man is bobbing for apples at the fair.
There is nothing about a man bobbing for apples that implies he is doing so at any particular location, such as a fair.
exists e1 x1 x2 x3 x4.(for(e1,x2) & in(x2,x3) & n_bucket(x3) & of(x3,x4) & n_plastic(x4) & n_apple(x2) & Actor(e1,x1) & v_bob(e1) & n_man(x1))
exists e1 x1 x2 x3.(n_fair(x3) & for(e1,x2) & at(x2,x3) & n_apple(x2) & Actor(e1,x1) & v_bob(e1) & n_man(x1))