A worker actively engaged in welding two pieces of railing together.
A worker welding after a storm caused rail damage.
Just because a worker is busy in welding two pieces of railing together, it doesn't imply a storm caused the rail damage.
exists e1 e2 e3 p1 s1 x1 x2 x3 x4 x5.(a_topic(x1) & a_actively(s1) & Manner(e1,s1) & in(e1,e3) & Theme(e3,x4) & Actor(e3,x3) & v_weld(e3) & exists s2.(Theme(s2,x5) & a_together(s2)) & Topic(e2,p1) & Actor(e2,x5) & v_rail(e2) & (x4 = x5) & n_piece(x4) & card_eq_2(x4) & Theme(e1,x2) & v_engage(e1) & (x1 = x2) & n_worker(x1))
exists e1 e2 x1 x2 x3 x4 x5.(Theme(e2,x4) & Actor(e2,x1) & v_cause(e2) & n_damage(x4) & of(x4,x5) & n_rail(x5) & after(e1,x3) & n_storm(x3) & Actor(e1,x2) & v_weld(e1) & (x1 = x2) & n_worker(x1))