The security guard is smiling.
A security guard is sleeping on the job.
The security guard is either smiling or sleeping.
exists e1 x1 x2.(n_guard(x1) & of(x1,x2) & n_security(x2) & Actor(e1,x1) & v_smile(e1))
exists e1 x1 x2 x3.(n_job(x3) & on(e1,x3) & Actor(e1,x1) & v_sleep(e1) & n_guard(x1) & of(x1,x2) & n_security(x2))