two girls ride camels.
Three girls ride camels.
There are either two or three girls.
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_camel(x2) & n_girl(x1) & card_eq_2(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_camel(x2) & n_girl(x1) & card_eq_3(x1))