The security guard is smiling.
The security guard flying in the air.
The security guard is either smiling or flying.
exists e1 x1 x2.(n_guard(x1) & of(x1,x2) & n_security(x2) & Actor(e1,x1) & v_smile(e1))
exists e1 x1 x2 x3 x4.(n_air(x4) & n_guard(x1) & of(x1,x2) & n_security(x2) & a_topic(x1) & in(e1,x4) & Actor(e1,x3) & v_fly(e1) & (x1 = x3))