A group of people are in front of a food truck.
The people are swiming
Can't be in front of a food truck if one is swimming.
exists p1 x1 x2.(exists x3 x4 x5.(in(x1,x3) & of(x3,x4) & n_truck(x4) & of(x4,x5) & n_food(x5) & n_front(x3)) & of(x1,x2) & n_people(x2) & n_group(x1))
exists e1 x1.(n_people(x1) & Actor(e1,x1) & v_swime(e1))