A group of young girls running.
A group of young girls running to catch a train
A group of young girls running does not always mean that they are running to catch a train.
exists e1 s1 x1 x2 x3.(a_topic(x1) & Actor(e1,x3) & v_run(e1) & (x1 = x3) & of(x1,x2) & n_girl(x2) & a_young(s1) & Theme(s1,x2) & n_group(x1))
exists e1 p1 s1 x1 x2 x3 x4.(a_topic(x1) & Topic(e1,p1) & exists e2 x5.(Theme(e2,x5) & Actor(e2,x3) & v_catch(e2) & n_train(x5)) & Actor(e1,x4) & v_run(e1) & (x1 = x4) & (x1 = x3) & of(x1,x2) & n_girl(x2) & a_young(s1) & Theme(s1,x2) & n_group(x1))