A group of people are shoveling material.
People are climbing a tree.
People are either shoveling or climbing a tree.
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_shovel(e1) & n_material(x3) & of(x1,x2) & n_people(x2) & n_group(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_climb(e1) & n_tree(x2) & n_people(x1))