A kid on skating ramp practicing cool moves.
A man is riding a bicycle.
One cannot be on a skating ramp as well as riding a bicycle.
exists e2 e1 s1 x1 x2 x3 x4.(a_topic(x1) & for(e1,e2) & Theme(e2,x4) & Actor(e2,x2) & v_practice(e2) & n_move(x4) & a_cool(s1) & Theme(s1,x4) & Theme(e1,x3) & Actor(e1,x2) & v_skate(e1) & n_ramp(x3) & (x1 = x2) & n_kid(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_bicycle(x2) & n_man(x1))