People walking or riding a bike around in the sand at dusk.
The people are going home from along day of exercising.
Just because riding a bike around in the sand doesn't mean they are going home from along day of exercising.
exists x3 x7.(n_sand(x7) & n_sand(x3) & (exists e1 s1 x1 x2 x4.(at(e1,x4) & n_dusk(x4) & in(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_walk(e1) & n_bike(x2) & a_around(s1) & Theme(s1,x2) & n_people(x1)) | exists e2 s2 x5 x6 x8.(at(e2,x8) & n_dusk(x8) & in(e2,x7) & Theme(e2,x6) & Actor(e2,x5) & v_ride(e2) & n_bike(x6) & a_around(s2) & Theme(s2,x6) & n_people(x5))))
exists e1 x1 x2 x3 x4.(n_people(x1) & along(e1,x3) & of(x3,x4) & n_exercise(x4) & n_day(x3) & r_from(e1) & Time(e1,x2) & n_home(x2) & Actor(e1,x1) & v_go(e1))