Workers cutting and weighing fish.
A group is working with sea life
Workers cutting fish would be a group working with sea life.
exists e1 e2 x1 x2 x3 x4.(Theme(e2,x4) & Actor(e2,x3) & v_weigh(e2) & n_fish(x4) & n_worker(x3) & Theme(e1,x2) & Actor(e1,x1) & v_cut(e1) & n_fish(x2) & n_worker(x1))
exists e1 x1 x2 x3.(with(e1,x2) & n_life(x2) & of(x2,x3) & n_sea(x3) & Actor(e1,x1) & v_work(e1) & n_group(x1))