premise: Persons standing underneath an arch way.
hypothesis: Persons are standing.
explanation_1: Persons are standing in both sentences.
explanation_2: 'Persons are standing' is a less detailed rephrasing of 'Persons standing underneath an arch way'.
explanation_3: Persons standing underneath means persons are standing.
premise_logic: exists e1 s1 x1 x2 x3.(a_topic(x1) & underneath(e1,x3) & n_way(x3) & a_arch(s1) & Theme(s1,x3) & Actor(e1,x2) & v_stand(e1) & (x1 = x2) & n_person(x1))
hypothesis_logic: exists e1 x1.(Actor(e1,x1) & v_stand(e1) & n_person(x1))