A dirt bike rider jumps into the air and does a trick.
The dirt bike rider is drinking.
Just because A dirt bike rider jumps into the air and does a trick does not indicate that he is drinking.
exists e2 e1 x1 x2 x3 x4 x5 x6 x7 x8.(n_air(x4) & Theme(e2,x8) & Actor(e2,x5) & v_do(e2) & n_trick(x8) & n_rider(x5) & of(x5,x7) & n_bike(x7) & of(x5,x6) & n_dirt(x6) & into(e1,x4) & Actor(e1,x1) & v_jump(e1) & n_rider(x1) & of(x1,x3) & n_bike(x3) & of(x1,x2) & n_dirt(x2))
exists p1 x1 x2 x3.(n_rider(x1) & of(x1,x3) & n_bike(x3) & of(x1,x2) & n_dirt(x2) & exists x4.((x1 = x4) & n_drinking(x4)))