The two passengers are seated in the waiting area a couple of chairs apart and yet both seem to be alone.
Two people are sitting by themselves.
Passengers are people.     People sitting by themselves are seated alone.
exists e2 e1 p1 x1 x2.(n_area(x2) & Actor(e2,x2) & v_wait(e2) & n_passenger(x1) & card_eq_2(x1) & in(e1,x2) & exists e3 p2 s1 x3 x4 x5 x6 x7.(Topic(e3,p2) & Actor(e3,x3) & v_seem(e3) & exists s2.(Theme(s2,x3) & a_alone(s2)) & subset_of(x7,x3) & r_yet(x7) & n_thing(x7) & subset_of(x4,x3) & Theme(s1,x6) & a_apart(s1) & (x4 = x6) & of(x4,x5) & n_chair(x5) & n_couple(x4)) & that(x2,p1) & Theme(e1,x1) & v_seat(e1))
exists e1 x1 x2.(n_group(x2) & by(e1,x2) & Actor(e1,x1) & v_sit(e1) & n_people(x1) & card_eq_2(x1))