a group of 9 bicycle riders in a group on a trail
There are 8 bicycle riders.
There are either 8 bicycle riders, or 9 bicycle riders.
exists x1 x2 x3 x4 x5.(a_topic(x1) & of(x1,x2) & on(x2,x5) & n_trail(x5) & in(x2,x4) & n_group(x4) & n_rider(x2) & of(x2,x3) & n_bicycle(x3) & n_date(x2) & a_date_day_09(x2) & a_date_day_09(x2) & n_group(x1))
exists p1 x1 x2 x3.((x1 = x2) & n_rider(x2) & of(x2,x3) & n_bicycle(x3) & n_date(x2) & a_date_day_08(x2) & a_date_day_08(x2))