Two people walk outside in a nature area.
The people are surrounded by pine trees.
Nature area doesn't necessarily have pine trees.
exists e1 x1 x2 x3 x4.(a_topic(x1) & in(e1,x4) & n_nature(x4) & outside(e1,x3) & n_area(x3) & Theme(e1,x2) & v_walk(e1) & (x1 = x2) & n_people(x1) & card_eq_2(x1))
exists e1 x1 x2 x3.(n_people(x1) & Actor(e1,x2) & n_tree(x2) & of(x2,x3) & n_pine(x3) & Theme(e1,x1) & v_surround(e1))