A group of 6 people riding camels follow one man on foot.
The people are racing horses.
It cannot be people are racing horses and people riding camels at the same time.  Must be one or the other.
exists e1 e2 x1 x2 x3 x4 x5 x6.(Theme(e2,x5) & Actor(e2,x1) & v_follow(e2) & on(x5,x6) & n_foot(x6) & n_man(x5) & card_eq_1(x5) & of(x1,x2) & Theme(e1,x4) & Actor(e1,x3) & v_ride(e1) & n_camel(x4) & (x2 = x3) & n_people(x2) & n_date(x2) & a_date_day_06(x2) & a_date_day_06(x2) & n_group(x1))
exists e1 x1 x2.(n_people(x1) & Theme(e1,x2) & Actor(e1,x1) & v_race(e1) & n_horse(x2))