boy skateboarding down a stair railing in winter
A boy skateboarding during the winter.
Both sentences have a boy who is skateboarding in the winter
exists e1 s1 x1 x2 x3 x4 x5.(a_topic(x1) & a_down(s1) & Manner(e1,s1) & Theme(e1,x3) & Actor(e1,x2) & v_skateboard(e1) & in(x3,x5) & n_winter(x5) & n_railing(x3) & of(x3,x4) & n_stair(x4) & (x1 = x2) & n_boy(x1))
exists e1 x1 x2 x3.(n_winter(x3) & a_topic(x1) & during(e1,x3) & Actor(e1,x2) & v_skateboard(e1) & (x1 = x2) & n_boy(x1))