Three helmet-wearing roller-blading children are next to a skating young adult.
Three children and their older brother are skating.
The young adult may not be their older brother.  Also, the three boys may not be brothers.
exists e1 s1 s2 s3 s4 x1 x2.(to(s3,x2) & n_adult(x2) & a_young(s4) & Theme(s4,x2) & Actor(e1,x2) & v_skate(e1) & Theme(s3,x1) & a_next(s3) & n_child(x1) & a_roller-blading(s2) & Theme(s2,x1) & a_helmet-wearing(s1) & Theme(s1,x1) & card_eq_3(x1))
exists e1 s1 x1 x2 x3.(Actor(e1,x1) & v_skate(e1) & subset_of(x3,x1) & n_brother(x3) & r_more(s1) & a_older(s1) & Theme(s1,x3) & of(x3,x2) & n_thing(x2) & subset_of(x2,x1) & n_child(x2) & card_eq_3(x2))