A man riding his bicycle in a competition waving at an audience member.
A man is riding a scooter down the hill.
A man can't be riding a bicycle and a scooter simultaneously.
exists e1 e2 x1 x2 x3 x4 x5 x6 x7.(a_topic(x1) & in(e1,x4) & at(e2,x6) & n_member(x6) & of(x6,x7) & n_audience(x7) & Actor(e2,x5) & v_wave(e2) & (x4 = x5) & n_competition(x4) & Theme(e1,x3) & Actor(e1,x2) & v_ride(e1) & n_bicycle(x3) & of(x3,x1) & n_male(x1) & (x1 = x2) & n_man(x1))
exists e1 x1 x2 x3.(n_hill(x3) & down(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_scooter(x2) & n_man(x1))