An old man sits on a low chair with a yellow tray on his lap.
An old man is sleeping
If he is sitting with a tray on his lap, he isn't sleeping.
exists e1 s1 s2 s3 x1 x2 x3 x4.(on(e1,x4) & n_lap(x4) & of(x4,x1) & n_male(x1) & with(e1,x3) & n_tray(x3) & a_yellow(s3) & Theme(s3,x3) & on(e1,x2) & n_chair(x2) & a_low(s2) & Theme(s2,x2) & Actor(e1,x1) & v_sit(e1) & n_man(x1) & a_old(s1) & Theme(s1,x1))
exists e1 s1 x1.(Actor(e1,x1) & v_sleep(e1) & n_man(x1) & a_old(s1) & Theme(s1,x1))