A young boy doing a wheelie on his bike.
A boy attempts to pop a wheelie for the first time.
A boy doing a wheelie does not imply the boy attempts to pop a wheelie for the first time.
exists e1 s1 x1 x2 x3 x4.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_do(e1) & on(x3,x4) & n_bike(x4) & of(x4,x1) & n_male(x1) & n_wheelie(x3) & (x1 = x2) & n_boy(x1) & a_young(s1) & Theme(s1,x1))
exists e1 p1 s1 x1 x3.(n_time(x3) & a_first(s1) & Theme(s1,x3) & Topic(e1,p1) & Actor(e1,x1) & v_attempt(e1) & exists e2 x2.(for(e2,x3) & Theme(e2,x2) & Actor(e2,x1) & v_pop(e2) & n_wheelie(x2)) & n_boy(x1))