A four wheel drive car is driving through the mud.
The vehicle is getting dirty.
Mud makes cars dirty.
exists e1 x1 x2 x3 x4.(n_mud(x4) & through(e1,x4) & Actor(e1,x1) & v_drive(e1) & n_car(x1) & of(x1,x3) & n_drive(x3) & of(x1,x2) & n_wheel(x2) & card_eq_4(x1))
exists e1 x1 x2.(n_vehicle(x1) & Theme(e1,x2) & Actor(e1,x1) & v_get(e1) & n_dirty(x2))