A boy riding a unicycle in the park.
A boy in the park.
The boy is riding a unicycle.
exists e1 x1 x2 x3 x4.(n_park(x4) & a_topic(x1) & in(e1,x4) & Theme(e1,x3) & Actor(e1,x2) & v_ride(e1) & n_unicycle(x3) & (x1 = x2) & n_boy(x1))
exists x1 x2.(n_park(x2) & a_topic(x1) & in(x1,x2) & n_boy(x1))