premise: A group of people and a dog sitting on the steps.
hypothesis: A group of dogs are waiting for their master.
explanation_1: The group of people sitting on steps have one dog.  The group of dogs wait on their master.
explanation_2: The subject cannot be both people and dogs simultaneously.
explanation_3: There cannot be a group of dogs if there is only a singular dog, or if the group consists of people.
premise_logic: exists e1 x1 x2 x3 x4 x5 x6.(n_step(x6) & a_topic(x1) & of(x1,x2) & subset_of(x4,x2) & on(e1,x6) & Actor(e1,x5) & v_sit(e1) & (x4 = x5) & n_dog(x4) & subset_of(x3,x2) & n_people(x3) & n_group(x1))
hypothesis_logic: exists e1 x1 x2 x3.(for(e1,x3) & n_master(x3) & of(x3,x1) & n_thing(x1) & Actor(e1,x1) & v_wait(e1) & of(x1,x2) & n_dog(x2) & n_group(x1))