Skateboarding on a beautiful day.
It's sleeping
You do not skateboard while you are sleeping.
exists e1 s1 x1 x2.(on(e1,x2) & n_day(x2) & a_beautiful(s1) & Theme(s1,x2) & Actor(e1,x1) & v_skateboard(e1) & n_thing(x1))
exists e1 x1.(n_thing(x1) & Actor(e1,x1) & v_sleep(e1))