People ordering food from a lunch cart outside.
The lunch cart is mexican food.
Because people are ordering food from a lunch cart, does not mean that the lunch cart is Mexican food.
exists e1 x1 x2 x3 x4 x5 x6.(a_topic(x1) & from(e1,x4) & n_outside(x4) & of(x4,x6) & n_cart(x6) & of(x4,x5) & n_lunch(x5) & Theme(e1,x3) & Actor(e1,x2) & v_order(e1) & n_food(x3) & (x1 = x2) & n_people(x1))
exists p1 x1 x2.(n_cart(x1) & of(x1,x2) & n_lunch(x2) & exists s1 x3.((x1 = x3) & n_food(x3) & a_mexican(s1) & Theme(s1,x3)))