The man in a blue sweatshirt is in a kitchen.
A person is cooking dinner.
Not all people cook dinner.
exists p1 s1 x1 x2.(n_man(x1) & exists x3.(in(x1,x3) & n_kitchen(x3)) & in(x1,x2) & n_sweatshirt(x2) & a_blue(s1) & Theme(s1,x2))
exists p1 x1.(exists s1 x2.((x1 = x2) & n_dinner(x2) & a_cooking(s1) & Theme(s1,x2)) & n_person(x1))