Customers are standing in line to buy something to eat.
The people wait outside the pizza restaurant for a slice of Joe's Pizza.
They could be at any restaurant, not necessarily Joe's Pizza, to by any sort of food.
exists e1 p1 x1 x2 x3.(Topic(e1,p1) & exists e2 p2 x4.(Topic(e2,p2) & exists e3.(Actor(e3,x1) & v_eat(e3)) & Theme(e2,x4) & Actor(e2,x1) & v_buy(e2) & n_thing(x4)) & in(e1,x3) & n_line(x3) & Actor(e1,x2) & v_stand(e1) & n_customer(x2) & n_customer(x1))
exists e1 x1 x2 x3 x4 x5 x6.(n_restaurant(x5) & of(x5,x6) & n_pizza(x6) & ne_org_pizza(x4) & of(x4,x3) & ne_org_joe(x3) & n_people(x1) & outside(e1,x5) & for(e1,x2) & of(x2,x4) & n_slice(x2) & Actor(e1,x1) & v_wait(e1))