A young girl is sitting on Santa's lap.
A young girl standing alone.
One cannot be standing alone at the same time one is sitting on Santa's lap.
exists e1 s1 s2 x1 x2.(on(e1,x2) & n_lap(x2) & a_'s(s2) & Theme(s2,x2) & ne_geo_santa(x2) & Actor(e1,x1) & v_sit(e1) & n_girl(x1) & a_young(s1) & Theme(s1,x1))
exists e1 s1 s2 x1 x2.(a_topic(x1) & a_alone(s2) & Manner(e1,s2) & Actor(e1,x2) & v_stand(e1) & (x1 = x2) & n_girl(x1) & a_young(s1) & Theme(s1,x1))