A young girl is writing on a piece of paper with a purple pencil.
A girl is drawing on the chalkboard.
The girl can not be writing and drawing at the same time.
exists e1 s1 s2 x1 x2 x3 x4.(on(e1,x2) & with(x2,x4) & n_pencil(x4) & a_purple(s2) & Theme(s2,x4) & of(x2,x3) & n_paper(x3) & n_piece(x2) & Actor(e1,x1) & v_write(e1) & n_girl(x1) & a_young(s1) & Theme(s1,x1))
exists e1 x1 x2.(n_chalkboard(x2) & on(e1,x2) & Actor(e1,x1) & v_draw(e1) & n_girl(x1))