Two people on dirt bikes jumping dirt ramps with several people in the background.
There is only one person on a bike.
two people are more then one person
exists e1 s1 x1 x2 x3 x4 x5 x6 x7 x8.(n_background(x8) & a_topic(x1) & on(x1,x2) & with(e1,x7) & in(x7,x8) & n_people(x7) & a_several(s1) & Theme(s1,x7) & Theme(e1,x5) & Actor(e1,x4) & v_jump(e1) & n_ramp(x5) & of(x5,x6) & n_dirt(x6) & (x2 = x4) & n_bike(x2) & of(x2,x3) & n_dirt(x3) & n_people(x1) & card_eq_2(x1))
exists p1 x1 x2 x3.((x1 = x2) & on(x2,x3) & n_bike(x3) & n_person(x2) & card_eq_1(x2) & r_only(x2))