A person is performing a trick in the air with a dirt bike.
Someone does air stunts on his bike.
A person is someone. Stunts is a synonym for a trick.
exists e1 x1 x2 x3 x4 x5.(n_air(x3) & with(e1,x4) & n_bike(x4) & of(x4,x5) & n_dirt(x5) & in(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_perform(e1) & n_trick(x2) & n_person(x1))
exists e1 x1 x2 x3.(on(e1,x3) & n_bike(x3) & of(x3,x1) & n_male(x1) & Theme(e1,x2) & Actor(e1,x1) & v_air(e1) & n_stunt(x2) & n_person(x1))