This person is skiing down a snowy mountain.
A woman stitching a skirt.
One cannot be skiing and stitching a skirt at the same time.
exists e1 s1 s2 x1 x2.(n_person(x1) & a_down(s2) & Manner(e1,s2) & Theme(e1,x2) & Actor(e1,x1) & v_ski(e1) & n_mountain(x2) & a_snowy(s1) & Theme(s1,x2))
exists e1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_stitch(e1) & n_skirt(x3) & (x1 = x2) & n_woman(x1))