A man in a gray hooded sweatshirt is preparing food.
The man is a chef.
You can not infer he is a chef.
exists e1 s1 s2 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_prepare(e1) & n_food(x3) & in(x1,x2) & n_sweatshirt(x2) & a_hooded(s2) & Theme(s2,x2) & a_gray(s1) & Theme(s1,x2) & n_man(x1))
exists p1 x1.(n_man(x1) & exists x2.((x1 = x2) & n_chef(x2)))