premise: People walk amongst a traffic jam in a crowded city.
hypothesis: The traffic is halted and people are walking between the cars.
explanation_1: Traffic halt is another way of saying traffic  jam.  People are walking between the cars due to the traffic being jammed in a crowded city.
explanation_2: If there is a traffic jam then that means cars are lined up closely behind each other, none of them able to move.  Traffic is halted means traffic jam.  People walk is similar to meaning as people walking.
explanation_3: traffic jam in a crowded city is inferred as The traffic is halted .
premise_logic: exists e1 s1 x1 x2 x3 x4.(amongst(e1,x2) & in(x2,x4) & n_city(x4) & a_crowded(s1) & Theme(s1,x4) & n_jam(x2) & of(x2,x3) & n_traffic(x3) & Actor(e1,x1) & v_walk(e1) & n_people(x1))
hypothesis_logic: exists e1 e2 x1 x2 x3.(n_car(x3) & n_traffic(x1) & between(e2,x3) & Actor(e2,x2) & v_walk(e2) & n_people(x2) & Theme(e1,x1) & v_halt(e1))