Six people in tank tops and helmets are rollerskating while two referees look on in the background.
Six people are present in play ground
For rollerskating one has to be in play ground.
exists e1 p1 x1 x2 x3 x4 x5 x7.(n_background(x7) & exists e2 x6.(r_on(e2) & in(e2,x7) & Actor(e2,x6) & v_look(e2) & n_referee(x6) & card_eq_2(x6)) & while(e1,p1) & Actor(e1,x1) & v_rollerskate(e1) & in(x1,x2) & subset_of(x5,x2) & n_helmet(x5) & subset_of(x3,x2) & n_top(x3) & of(x3,x4) & n_tank(x4) & n_people(x1) & card_eq_6(x1))
exists s1 x1 x2 x3.(in(s1,x2) & n_ground(x2) & of(x2,x3) & n_play(x3) & Theme(s1,x1) & a_present(s1) & n_people(x1) & card_eq_6(x1))