The bike rider runs with his red bike while another gains on him, both wearing green outfits and black helmets.
The biker in the back quickly overtakes his friend in a race
A rider gains on another does not imply the rider quickly overtakes or is in a race necessarily.
exists e2 e1 s1 s2 s3 x1 x2 x3 x4 x5 x6 x7 x8.(n_helmet(x8) & a_black(s3) & Theme(s3,x8) & n_outfit(x7) & subset_of(x8,x6) & subset_of(x7,x6) & a_green(s2) & Theme(s2,x6) & Actor(e2,x6) & v_wear(e2) & n_male(x1) & n_male(x1) & n_gain(x3) & n_bike(x2) & n_bike(x2) & a_red(s1) & Theme(s1,x2) & of(x2,x1) & n_rider(x1) & of(x1,x2) & while(e1,x4) & on(x4,x5) & subset_of(x6,x5) & subset_of(x1,x5) & n_gain(x4) & -(x4 = x3) & with(e1,x2) & Actor(e1,x1) & v_run(e1))
exists e1 s1 x1 x2 x3 x4.(n_friend(x3) & of(x3,x1) & n_male(x1) & n_back(x2) & n_biker(x1) & a_quickly(s1) & Manner(e1,s1) & in(e1,x4) & n_race(x4) & Theme(e1,x3) & Actor(e1,x1) & v_overtake(e1) & in(x1,x2))