Wrecked ambulance is being towed by a large truck.
Wrecked ambulance is happily being towed
There's noting to believe that the ambulance is happily  towed.
exists e2 e1 s1 x1 x2.(Actor(e2,x2) & n_truck(x2) & a_large(s1) & Theme(s1,x2) & Theme(e2,x1) & v_tow(e2) & n_ambulance(x1) & Theme(e1,x1) & v_wreck(e1))
exists e1 e2 s1 x1.(a_happily(s1) & Manner(e2,s1) & Theme(e2,x1) & v_tow(e2) & n_ambulance(x1) & Theme(e1,x1) & v_wreck(e1))