premise: A welder is working outside by some concrete ruble
hypothesis: A welder is attaching two pieces of metal to each other
explanation_1: The welder may be taking measurement or be cutting a piece of metal for his work and not attaching anything.
explanation_2: A welder attaching two pieces of metal to each other doesn't necessarily mean they are working by concrete ruble.
explanation_3: A welder is not necessarily attaching two pieces together.
premise_logic: exists e1 s1 s2 x1 x2.(by(e1,x2) & n_ruble(x2) & a_concrete(s2) & Theme(s2,x2) & a_outside(s1) & Manner(e1,s1) & Actor(e1,x1) & v_work(e1) & n_welder(x1))
hypothesis_logic: exists e1 x1 x2 x3.(all x4.(n_other(x4) -> to(e1,x4)) & Theme(e1,x2) & Actor(e1,x1) & v_attach(e1) & of(x2,x3) & n_metal(x3) & n_piece(x2) & card_eq_2(x2) & n_welder(x1))
premise_sim: exists e1 s1 s2 x1 x2.(v_work(e1) & n_welder(x1) & n_ruble(x2) & by(e1,x2) & a_outside(s1) & a_concrete(s2) & Theme(s2,x2) & Manner(e1,s1) & Actor(e1,x1))
hypothesis_sim: exists e1 x1 x2 x3.(v_attach(e1) & of(x2,x3) & n_welder(x1) & n_piece(x2) & n_metal(x3) & card_eq_2(x2) & all x4.(to(e1,x4) | -n_other(x4)) & Theme(e1,x2) & Actor(e1,x1))