The bicyclists are in a race.
There are several people and bikes in this picture.
Bicyclists means people on bikes.
exists p1 x1.(n_bicyclist(x1) & exists x2.(in(x1,x2) & n_race(x2)))
exists p1 x1 x2.(n_picture(x2) & in(p1,x2) & exists s1 x3 x4 x5.((x1 = x3) & n_bike(x5) & n_people(x4) & subset_of(x5,x3) & subset_of(x4,x3) & a_several(s1) & Theme(s1,x3)))