A man is riding the bike without wearing his helmet.
The man has been bowling for hours.
One can not be riding a bike and bowling simultaneously.
exists e1 x1 x2 x3.(n_helmet(x3) & of(x3,x2) & n_male(x2) & n_bike(x2) & -exists e2.(manner(e1,e2) & Theme(e2,x3) & Actor(e2,x1) & v_wear(e2)) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_man(x1))
exists e1 x1 x2.(n_man(x1) & for(e1,x2) & n_hour(x2) & Actor(e1,x1) & v_bowl(e1))