A woman checks her cellphone while sitting at a table with another woman.
A woman is writing a letter.
A woman can't be checking her cellphone and writing a letter at the same time.
exists e2 e1 x1 x2 x3 x4.(while(e1,e2) & with(e2,x4) & n_woman(x4) & -(x4 = x1) & n_woman(x1) & n_woman(x1) & at(e2,x3) & n_table(x3) & Actor(e2,x1) & v_sit(e2) & Theme(e1,x2) & Actor(e1,x1) & v_check(e1) & n_cellphone(x2) & of(x2,x1) & n_female(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_write(e1) & n_letter(x2) & n_woman(x1))