A woman with red-hair in a tan shirt walking down the street.
There is a woman in a tan shirt.
There is a woman in a tan shirt is a less descriptive reiteration of a woman with red-hair in a tan shirt walking down the street; it conveys the impression that there is a woman or women possibly, somewhere, in a tan shirt. A woman with red hair in a tan shirt walking down the street conveys the idea that such a woman in a tan shirt is HERE walking down the street.
exists e1 s1 x1 x2 x3 x4 x5.(n_street(x5) & a_topic(x1) & down(e1,x5) & Actor(e1,x4) & v_walk(e1) & (x1 = x4) & in(x1,x3) & n_shirt(x3) & a_tan(s1) & Theme(s1,x3) & with(x1,x2) & n_red-hair(x2) & n_woman(x1))
exists p1 x1 s1 x2 x3.((x1 = x2) & in(x2,x3) & n_shirt(x3) & a_tan(s1) & Theme(s1,x3) & n_woman(x2))