A worker in an orange vest is using a shovel.
No bunnies are wearing an orange vest and using a shovel.
Different entity (Worker and bunnies). The worker is using a dhovel while the bunnies not.
exists e1 x1 x2 x3 x4.(Theme(e1,x4) & Actor(e1,x1) & v_use(e1) & n_shovel(x4) & in(x1,x2) & n_vest(x2) & of(x2,x3) & n_orange(x3) & n_worker(x1))
(-exists e2 x4 x5.(Theme(e2,x5) & Actor(e2,x4) & v_use(e2) & n_shovel(x5) & n_bunny(x4)) & -exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_wear(e1) & n_vest(x2) & of(x2,x3) & n_orange(x3) & n_bunny(x1)))