Three people are riding around on ATV's and motorcycles.
the child was 18 years old
It cannot be a child and three people simultaneously.
exists e1 x1 x2 x3 x4 x5.(r_around(e1) & on(e1,x2) & subset_of(x5,x2) & n_motorcycle(x5) & subset_of(x3,x2) & n_'s(x3) & (x3 = x4) & ne_org_atv(x4) & Actor(e1,x1) & v_ride(e1) & n_people(x1) & card_eq_3(x1))
exists e1 x1 x2.(n_child(x1) & Theme(e1,x2) & Pivot(e1,x1) & r_more(e1) & v_old(e1) & n_year(x2) & n_date(x2) & a_date_day_18(x2) & a_date_day_18(x2))