A motorcyclist biking through dusty terrain.
The men are sitting on the stone steps.
One can not be biking and sitting simultaneously.
exists e1 s1 x1 x2 x3.(a_topic(x1) & through(e1,x3) & n_terrain(x3) & a_dusty(s1) & Theme(s1,x3) & Actor(e1,x2) & v_bike(e1) & (x1 = x2) & n_motorcyclist(x1))
exists e1 x1 x2 x3.(n_step(x2) & of(x2,x3) & n_stone(x3) & n_man(x1) & on(e1,x2) & Actor(e1,x1) & v_sit(e1))