A man is servicing a truck.
The man is fixing a motorcycle.
THe man is either servicing a truck or fixing a motorcycle.
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_service(e1) & n_truck(x2) & n_man(x1))
exists e1 x1 x2.(n_man(x1) & Theme(e1,x2) & Actor(e1,x1) & v_fix(e1) & n_motorcycle(x2))