A person holding a tray of food in front of two guys.
The waiter is dropping the food off.
We have no idea if the person is a waiter or who he is and we have no idea if he is dropping off the food or doing something else.
exists e1 x1 x2 x3 x4 x5 x6.(a_topic(x1) & in(e1,x5) & of(x5,x6) & n_guy(x6) & card_eq_2(x6) & n_front(x5) & Theme(e1,x3) & Actor(e1,x2) & v_hold(e1) & of(x3,x4) & n_food(x4) & n_tray(x3) & (x1 = x2) & n_person(x1))
exists e1 s1 x1 x2.(n_food(x2) & n_waiter(x1) & a_off(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_drop(e1))