A man in a black apron cooks up some meat on a grill.
The man is cooking food for a group of friends.
The man could be a cook at a restaurant, not friends.
exists s1 x1 x2 x3 x4 x5.(a_topic(x1) & in(x1,x2) & up(x2,x4) & on(x4,x5) & n_grill(x5) & n_meat(x4) & n_cook(x2) & of(x2,x3) & n_apron(x3) & a_black(s1) & Theme(s1,x2) & n_man(x1))
exists p1 x1.(n_man(x1) & exists s1 x2 x3 x4.((x1 = x2) & for(x2,x3) & of(x3,x4) & n_friend(x4) & n_group(x3) & n_food(x2) & a_cooking(s1) & Theme(s1,x2)))