The man in the clown costume and hat is riding a bike
The clown is an alien.
One describes a man and the other describes a clown.
exists e1 s1 x1 x2 x3 x4 x5.(n_hat(x4) & n_costume(x3) & a_clown(s1) & Theme(s1,x3) & subset_of(x4,x2) & subset_of(x3,x2) & n_man(x1) & Theme(e1,x5) & Actor(e1,x1) & v_ride(e1) & n_bike(x5) & in(x1,x2))
exists p1 x1.(n_clown(x1) & exists x2.((x1 = x2) & n_alien(x2)))