Several men traveling down a hill riding donkeys.
the men are riding
men riding donkeys is same as men are riding
exists e1 s1 s2 x1 x2 x3 x4 x5.(a_topic(x1) & a_down(s2) & Manner(e1,s2) & Theme(e1,x3) & Actor(e1,x2) & v_travel(e1) & n_donkey(x3) & of(x3,x5) & n_riding(x5) & of(x3,x4) & n_hill(x4) & (x1 = x2) & n_man(x1) & a_several(s1) & Theme(s1,x1))
exists e1 x1.(n_man(x1) & Actor(e1,x1) & v_ride(e1))