Young man riding a bicycle in a race.
a young man is sitting on his couch
riding a bicycle is not by sitting on his couch
exists e1 s1 x1 x2 x3 x4.(a_topic(x1) & in(e1,x4) & n_race(x4) & Theme(e1,x3) & Actor(e1,x2) & v_ride(e1) & n_bicycle(x3) & (x1 = x2) & n_man(x1) & a_young(s1) & Theme(s1,x1))
exists e1 s1 x1 x2.(on(e1,x2) & n_couch(x2) & of(x2,x1) & n_male(x1) & Actor(e1,x1) & v_sit(e1) & n_man(x1) & a_young(s1) & Theme(s1,x1))