A middle-aged man sitting in a chair holding a drink, sleeping.
The man is by himself.
The man isn't necessarily by himself.
exists e1 e3 e2 s1 x1 x2 x3 x4.(a_topic(x1) & for(e2,e3) & Actor(e3,x2) & v_sleep(e3) & for(e1,e2) & Theme(e2,x4) & Actor(e2,x2) & v_hold(e2) & n_drink(x4) & in(e1,x3) & n_chair(x3) & Actor(e1,x2) & v_sit(e1) & (x1 = x2) & n_man(x1) & a_middle-aged(s1) & Theme(s1,x1))
exists p1 x1 x2.(n_male(x2) & n_man(x1) & by(x1,x2))