A family buys ice cream from a truck at night.
A family is working in a garden.
If they buy ice cream, they cannot be working in a garden.
exists e1 x1 x2 x3 x4 x5.(from(e1,x4) & at(x4,x5) & n_night(x5) & n_truck(x4) & Theme(e1,x2) & Actor(e1,x1) & v_buy(e1) & n_cream(x2) & of(x2,x3) & n_ice(x3) & n_family(x1))
exists e1 x1 x2.(in(e1,x2) & n_garden(x2) & Actor(e1,x1) & v_work(e1) & n_family(x1))