A referee talking with a group of girls wearing helmets and rollerskates.
None of the skaters were wearing protective gear.
One is either wearing protective gear or not wearing protective gear.
exists e1 e2 x1 x2 x3 x4 x5 x6 x7 x8.(a_topic(x1) & with(e1,x3) & Theme(e2,x6) & Actor(e2,x5) & v_wear(e2) & subset_of(x8,x6) & n_rollerskate(x8) & subset_of(x7,x6) & n_helmet(x7) & (x3 = x5) & of(x3,x4) & n_girl(x4) & n_group(x3) & Actor(e1,x2) & v_talk(e1) & (x1 = x2) & n_referee(x1))
exists e1 s1 x1 x2 x3.(n_skater(x2) & Theme(e1,x3) & Actor(e1,x1) & v_wear(e1) & n_gear(x3) & a_protective(s1) & Theme(s1,x3) & of(x1,x2) & n_none(x1))