A skateboarder leaps of steps outside a corporate building.
A skateboarder is being watched by security.
A skateboarder leaps of steps outside a corporate building does not mean he is being watched by security
exists s1 x1 x2 x3 x4.(a_topic(x1) & of(x1,x3) & outside(x3,x4) & n_building(x4) & a_corporate(s1) & Theme(s1,x4) & n_step(x3) & n_leap(x1) & of(x1,x2) & n_skateboarder(x2))
exists e1 x1 x2.(Actor(e1,x2) & n_security(x2) & Theme(e1,x1) & v_watch(e1) & n_skateboarder(x1))