A man in a white shirt drags a metal keg.
a man going to a party
Just because a man drags a metal keg doesn't imply a man going to a party.
exists e1 s1 x1 x2 x3 x4.(Theme(e1,x3) & Actor(e1,x1) & v_drag(e1) & n_keg(x3) & of(x3,x4) & n_metal(x4) & in(x1,x2) & n_shirt(x2) & a_white(s1) & Theme(s1,x2) & n_man(x1))
exists e1 x1 x2 x3.(a_topic(x1) & to(e1,x3) & n_party(x3) & Actor(e1,x2) & v_go(e1) & (x1 = x2) & n_man(x1))