Four boys are playing hockey in rollerskates while wearing blue and white safety gear.
Boys are playing hockey.
There are boys playing hockey in each scene.
exists e1 e2 s1 s2 x1 x2 x3 x4 x5.(while(e1,e2) & Theme(e2,x4) & Actor(e2,x1) & v_wear(e2) & n_gear(x4) & of(x4,x5) & n_safety(x5) & a_white(s2) & Theme(s2,x4) & a_blue(s1) & Theme(s1,x4) & in(e1,x3) & n_rollerskate(x3) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_hockey(x2) & n_boy(x1) & card_eq_4(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_hockey(x2) & n_boy(x1))