A boy running through a grassy area in a park.
The boy is sitting on his skateboard.
A boy cannot be running and sitting the same time.
exists e1 s1 x1 x2 x3 x4.(a_topic(x1) & in(e1,x4) & n_park(x4) & through(e1,x3) & n_area(x3) & a_grassy(s1) & Theme(s1,x3) & Actor(e1,x2) & v_run(e1) & (x1 = x2) & n_boy(x1))
exists e1 x1 x2.(n_skateboard(x2) & of(x2,x1) & n_male(x1) & n_boy(x1) & on(e1,x2) & Actor(e1,x1) & v_sit(e1))