A person is sitting on the ground reading a book.
The ground was wet.
You would not continue to sit on the ground if it was wet.
exists e1 e2 x1 x2 x3 x4.(n_ground(x2) & on(e1,x2) & Theme(e2,x4) & Actor(e2,x3) & v_read(e2) & n_book(x4) & (x2 = x3) & Actor(e1,x1) & v_sit(e1) & n_person(x1))
exists s1 x1.(n_ground(x1) & Theme(s1,x1) & a_wet(s1))