A woman in a black-shirt is walking holding a silver cellphone.
a man is walking
In sentence one, a woman is walking. In sentence two, a man is walking. It must be one or the other.
exists e1 e2 x1 x2 x3 x4.(for(e1,e2) & Theme(e2,x3) & Actor(e2,x1) & v_hold(e2) & n_cellphone(x3) & of(x3,x4) & n_silver(x4) & Actor(e1,x1) & v_walk(e1) & in(x1,x2) & n_black-shirt(x2) & n_woman(x1))
exists e1 x1.(Actor(e1,x1) & v_walk(e1) & n_man(x1))