A man in a dark, blue shirt is using a wheelbarrow to dump dirt next to a fence.
A man in a pink shirt is riding in a wheelbarrow while his friend pushes.
The man can either be wearing a blue shirt or a pink shirt.  If he was using a wheelbarrow he can't be riding in it.
exists e1 p1 s1 s2 x1 x2 x3 x4.(Theme(e1,p1) & Recipient(e1,x4) & Actor(e1,x1) & v_use(e1) & exists e2 x5 x6 x7.(Theme(e2,x5) & Actor(e2,x1) & v_dump(e2) & to(x6,x7) & n_fence(x7) & next(x5,x6) & n_thing(x6) & n_dirt(x5)) & n_wheelbarrow(x4) & in(x1,x2) & n_shirt(x2) & a_blue(s2) & Theme(s2,x2) & a_,(s1) & Theme(s1,x2) & of(x2,x3) & n_dark(x3) & n_man(x1))
exists e1 s1 x1 x2 x3 x4 x5.(while(e1,x4) & n_push(x4) & of(x4,x5) & n_friend(x5) & of(x4,x1) & n_male(x1) & in(e1,x3) & n_wheelbarrow(x3) & Actor(e1,x1) & v_ride(e1) & in(x1,x2) & n_shirt(x2) & a_pink(s1) & Theme(s1,x2) & n_man(x1))