A man with backpack stands in front of a brown brick wall.
A man with a backpack is riding a bike.
The man cannot simultaneously stand and be riding a bike
exists s1 x1 x2 x3 x4 x5 x6.(a_topic(x1) & with(x1,x2) & in(x2,x4) & of(x4,x5) & n_wall(x5) & of(x5,x6) & n_brick(x6) & a_brown(s1) & Theme(s1,x5) & n_front(x4) & n_stand(x2) & of(x2,x3) & n_backpack(x3) & n_man(x1))
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_ride(e1) & n_bike(x3) & with(x1,x2) & n_backpack(x2) & n_man(x1))