A man in jeans is riding an ATV over sand.
He is riding a bicycle.
A bicycle and an ATV are different vehicles. You can't ride them at the same time.
exists e1 x1 x2 x3 x4.(over(e1,x4) & n_sand(x4) & Theme(e1,x3) & Actor(e1,x1) & v_ride(e1) & ne_org_atv(x3) & in(x1,x2) & n_jeans(x2) & n_man(x1))
exists e1 x1 x2.(n_male(x1) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_bicycle(x2))