premise: Elderly people walking down a city street.
hypothesis: The elderly people are swimming in the pool.
explanation_1: People cannot be walking down a city street and swimming in the pool a the same time.
explanation_2: The elderly people can't be walking down a street at the same time as they are swimming in a pool.
explanation_3: People cannot be walking and swimming simultaneously.
premise_logic: exists e1 s1 s2 x1 x2 x3 x4.(a_topic(x1) & a_down(s2) & Manner(e1,s2) & Theme(e1,x3) & Actor(e1,x2) & v_walk(e1) & n_street(x3) & of(x3,x4) & n_city(x4) & (x1 = x2) & n_people(x1) & a_elderly(s1) & Theme(s1,x1))
hypothesis_logic: exists e1 s1 x1 x2.(n_pool(x2) & n_people(x1) & a_elderly(s1) & Theme(s1,x1) & in(e1,x2) & Actor(e1,x1) & v_swim(e1))