A man in a white shirt is working at a computer.
A man is sleeping in bed
It is impossible to be working and sleeping at the same time.
exists e1 s1 x1 x2 x3.(at(e1,x3) & n_computer(x3) & Actor(e1,x1) & v_work(e1) & in(x1,x2) & n_shirt(x2) & a_white(s1) & Theme(s1,x2) & n_man(x1))
exists e1 x1 x2.(in(e1,x2) & n_bed(x2) & Actor(e1,x1) & v_sleep(e1) & n_man(x1))