Guy in white shirt and glasses cooking food at home.
A guy is making steak.
Guy in white shirt and glasses is not mandatory to prepare steak.
exists e1 s1 s2 s3 x1 x2 x3 x4.(ne_nam_guy(s1) & a_topic(s1) & at(e1,x4) & n_home(x4) & Theme(e1,x3) & Actor(e1,x2) & v_glass(e1) & n_food(x3) & a_cooking(s3) & Theme(s3,x3) & (s1 = x2) & in(s1,x1) & n_shirt(x1) & a_white(s2) & Theme(s2,x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_make(e1) & n_steak(x2) & n_guy(x1))