Two motorcyclists race on an asphalt track on purple and green motorcycles.
two bikers are swimming laps at the olympic pool
Two motorcyclists and two bikers are not the same at all, the examples are about 2 different groups
exists s1 x1 x2 x3 x4 x5 x6.(a_topic(x1) & on(x1,x3) & on(x3,x5) & n_motorcycle(x5) & a_green(s1) & Theme(s1,x5) & of(x5,x6) & n_purple(x6) & n_track(x3) & of(x3,x4) & n_asphalt(x4) & n_race(x1) & of(x1,x2) & n_motorcyclist(x2) & card_eq_2(x1))
exists e1 s1 x1 x2 x3.(n_pool(x3) & a_olympic(s1) & Theme(s1,x3) & at(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_swim(e1) & n_lap(x2) & n_biker(x1) & card_eq_2(x1))