A man performing a trick on a bicycle by standing on the pedals while the bike is upright.
A man walks slowly down the street
Walks and performing a trick are different.
exists e2 e1 p1 x1 x2 x3 x4 x5 x6.(n_bike(x6) & n_pedal(x5) & a_topic(x1) & by(e1,e2) & exists s1.(Theme(s1,x6) & a_upright(s1)) & while(e2,p1) & on(e2,x5) & Actor(e2,x2) & v_stand(e2) & on(e1,x4) & n_bicycle(x4) & Theme(e1,x3) & Actor(e1,x2) & v_perform(e1) & n_trick(x3) & (x1 = x2) & n_man(x1))
exists e1 s1 x1 x2.(n_street(x2) & down(e1,x2) & a_slowly(s1) & Manner(e1,s1) & Actor(e1,x1) & v_walk(e1) & n_man(x1))