Two men fillet a fish at a sink while others watch.
Two men are preparing a fish in a kitchen.
Filleting a fish is not the same as preparing a fish. The men could be somewhere besides a kitchen.
exists e1 p1 x1 x2 x3.(exists e2 x4.(Actor(e2,x4) & v_watch(e2) & -(x4 = x1) & n_person(x4)) & n_person(x1) & while(e1,p1) & at(e1,x3) & n_sink(x3) & Theme(e1,x2) & Actor(e1,x1) & v_fillet(e1) & n_fish(x2) & n_man(x1) & card_eq_2(x1))
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_prepare(e1) & in(x2,x3) & n_kitchen(x3) & n_fish(x2) & n_man(x1) & card_eq_2(x1))