A few women are observing various trees.
the child was happy
There can either be women or a child.  Observing trees does not mean they are happy.
exists e1 s1 s2 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_observe(e1) & n_tree(x2) & a_various(s2) & Theme(s2,x2) & n_woman(x1) & a_few(s1) & Theme(s1,x1))
exists s1 x1.(n_child(x1) & Theme(s1,x1) & a_happy(s1))