three bikers bike across the dry land.
People are riding outside.
Dry land is outside so if they ride across the dry land then they are riding outside.
exists s1 x1 x2 x3.(n_land(x3) & a_dry(s1) & Theme(s1,x3) & a_topic(x1) & across(x1,x3) & n_bike(x1) & of(x1,x2) & n_biker(x2) & card_eq_3(x1))
exists e1 s1 x1.(a_outside(s1) & Manner(e1,s1) & Actor(e1,x1) & v_ride(e1) & n_people(x1))