premise: They are sitting with clothes on.
hypothesis: Several people wait for their luggage at the airport.
explanation_1: The sentence is unclear as to what the pronoun 'they' references and what the setting is. Nothing is said about few or several or any number of people, or luggage, or any other indicator of setting.
explanation_2: Sitting with clothes on doesn't imply to wait for luggage at the airport.
explanation_3: Just because sitting with clothes on does not mean at the airport.
premise_logic: exists e1 s1 x1.(a_on(s1) & Manner(e1,s1) & with(e1,x1) & n_clothes(x1) & Actor(e1,x1) & v_sit(e1) & n_thing(x1))
hypothesis_logic: exists e1 s1 x1 x2 x3.(n_airport(x3) & for(e1,x2) & at(x2,x3) & n_luggage(x2) & of(x2,x1) & n_thing(x1) & Actor(e1,x1) & v_wait(e1) & n_people(x1) & a_several(s1) & Theme(s1,x1))
premise_sim: exists e1 s1 x1.(with(e1,x1) & v_sit(e1) & n_thing(x1) & n_clothes(x1) & a_on(s1) & Manner(e1,s1) & Actor(e1,x1))
hypothesis_sim: exists e1 s1 x1 x2 x3.(v_wait(e1) & of(x2,x1) & n_thing(x1) & n_people(x1) & n_luggage(x2) & n_airport(x3) & for(e1,x2) & at(x2,x3) & a_several(s1) & Theme(s1,x1) & Actor(e1,x1))