A young boy in red pants runs underneath a tree.
A young boy in blue pants runs on stairs.
The boy is either wearing red pants while running underneath a tree, or is wearing blue pants while running on stairs.
exists e1 s1 s2 x1 x2 x3.(underneath(e1,x3) & n_tree(x3) & Actor(e1,x1) & v_run(e1) & in(x1,x2) & n_pants(x2) & a_red(s2) & Theme(s2,x2) & n_boy(x1) & a_young(s1) & Theme(s1,x1))
exists e1 s1 s2 x1 x2 x3.(on(e1,x3) & n_stair(x3) & Actor(e1,x1) & v_run(e1) & in(x1,x2) & n_pants(x2) & a_blue(s2) & Theme(s2,x2) & n_boy(x1) & a_young(s1) & Theme(s1,x1))