A girl is writing something in paper.
A girl is writing.
Writing something in paper is a descriptive version of saying someone is writing. It tells us how someone is writing but means the same thing as just writing.
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_write(e1) & in(x2,x3) & n_paper(x3) & n_thing(x2) & n_girl(x1))
exists e1 x1.(Actor(e1,x1) & v_write(e1) & n_girl(x1))