a biker rides down the street.
A biker is standing in a house
The biker that rides cannot be standing and the street is outdoors and not in a house.
exists e1 x1 x2.(n_street(x2) & down(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_biker(x1))
exists e1 x1 x2.(in(e1,x2) & n_house(x2) & Actor(e1,x1) & v_stand(e1) & n_biker(x1))