A man pushes multiple shopping carts across a parking lot.
A man trips over a shopping cart.
The lack of a plural at the end means that it was just a shopping cart, not more than one, that caused the accident. Trips and pushes aren't the same because one involves the legs and feet and the other involves the arms and hands.
exists e1 s1 x1 x2 x3 x4 x5.(across(e1,x4) & n_lot(x4) & of(x4,x5) & n_parking(x5) & Theme(e1,x2) & Actor(e1,x1) & v_push(e1) & n_cart(x2) & of(x2,x3) & n_shopping(x3) & a_multiple(s1) & Theme(s1,x2) & n_man(x1))
exists e1 x1 x2 x3.(over(e1,x2) & n_cart(x2) & of(x2,x3) & n_shopping(x3) & Actor(e1,x1) & v_trip(e1) & n_man(x1))