A boy in a green sweater is sitting at a table.
The boy isn't wearing anything green.
The boy cannot be wearing a green sweater and not wearing anything green at the same time
exists e1 s1 x1 x2 x3.(at(e1,x3) & n_table(x3) & Actor(e1,x1) & v_sit(e1) & in(x1,x2) & n_sweater(x2) & a_green(s1) & Theme(s1,x2) & n_boy(x1))
exists x1.(n_boy(x1) & -all x2.(n_thing(x2) -> exists e1 s1 x3.(Theme(e1,x2) & Actor(e1,x1) & v_wear(e1) & Theme(s1,x3) & a_green(s1) & (x2 = x3))))