A referee, on rollerskates, sweeps a gym floor.
A gym floor gets cleaned
sweeps the gym floor is also a gym floor gets cleaned.
exists e1 x1 x2 x3 x4.(on(e1,x4) & n_rollerskate(x4) & Theme(e1,x2) & Actor(e1,x1) & v_sweep(e1) & n_floor(x2) & of(x2,x3) & n_gym(x3) & n_referee(x1))
exists e1 p1 x1 x2.(exists e2.(Theme(e2,x1) & v_clean(e2)) & Topic(e1,p1) & Actor(e1,x1) & v_get(e1) & n_floor(x1) & of(x1,x2) & n_gym(x2))