A man is shoveling snow during a sunrise.
A man shoveling snow before work.
Just because during sunrise does not necessarily mean before work.
exists e1 x1 x2 x3.(during(e1,x3) & n_sunrise(x3) & Theme(e1,x2) & Actor(e1,x1) & v_shovel(e1) & n_snow(x2) & n_man(x1))
exists e1 x1 x2 x3 x4.(a_topic(x1) & before(e1,x4) & n_work(x4) & Theme(e1,x3) & Actor(e1,x2) & v_shovel(e1) & n_snow(x3) & (x1 = x2) & n_man(x1))