Mountains with trees loom high in the background.
They are pine trees.
Not all trees are pine trees
exists e1 p1 x1 x2 x3.(n_background(x3) & in(e1,x3) & exists s1.(Theme(s1,x1) & a_high(s1)) & Topic(e1,p1) & Actor(e1,x1) & v_loom(e1) & with(x1,x2) & n_tree(x2) & n_mountain(x1))
exists p1 x1.(n_thing(x1) & exists s1 x2.((x1 = x2) & n_tree(x2) & a_pine(s1) & Theme(s1,x2)))