Two younger people are being pulled on watercraft behind a boat.
Two people are outside.
Boats are usually outside.
exists e1 s1 x1 x2 x3.(behind(e1,x3) & n_boat(x3) & on(e1,x2) & n_watercraft(x2) & Theme(e1,x1) & v_pull(e1) & n_people(x1) & r_more(s1) & a_younger(s1) & Theme(s1,x1) & card_eq_2(x1))
exists s1 x1.(Theme(s1,x1) & a_outside(s1) & n_people(x1) & card_eq_2(x1))