A referee wearing skates and a helmet is mopping the floor of what looks to be a basketball court.
The referee had nothing in his hands.
A referee is mopping the floor and not doing nothing.
exists e1 x1 x2 x3 x4 x5 x6.(n_floor(x6) & exists e2 e3 p1 x7.(n_thing(x7) & Theme(e3,x6) & Actor(e3,x1) & v_mop(e3) & of(x6,x7) & Topic(e2,p1) & Actor(e2,x7) & v_look(e2) & exists p2 x8 x9.((x7 = x8) & n_court(x8) & of(x8,x9) & n_basketball(x9))) & subset_of(x5,x1) & n_helmet(x5) & subset_of(x2,x1) & Theme(e1,x4) & Actor(e1,x3) & v_wear(e1) & n_skate(x4) & (x2 = x3) & n_referee(x2))
exists x1 x3.(n_hand(x3) & of(x3,x1) & n_male(x1) & n_referee(x1) & -exists e1 x2.(in(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & n_thing(x2)))