A cyclist is riding along a white line in a busy city center.
A man rides on a bus.
Assuming the cyclist is the same man, then he cannot be riding a bike and riding a bus at the same time.
exists e1 s1 s2 x1 x2 x3 x4.(along(e1,x2) & in(x2,x3) & n_center(x3) & of(x3,x4) & n_city(x4) & a_busy(s2) & Theme(s2,x3) & n_line(x2) & a_white(s1) & Theme(s1,x2) & Actor(e1,x1) & v_ride(e1) & n_cyclist(x1))
exists e1 x1 x2.(on(e1,x2) & n_bus(x2) & Actor(e1,x1) & v_ride(e1) & n_man(x1))