Two little children are walking up some steps to get into an airplane.
Two children board a plane for the first time.
It is not implied that this is the children's first time boarding an airplane.
exists e1 p1 s1 s2 s3 x1 x2 x3.(Topic(e1,p1) & exists e2 x4.(into(e2,x4) & n_airplane(x4) & Actor(e2,x1) & v_get(e2)) & a_up(s3) & Manner(e1,s3) & Theme(e1,x3) & Actor(e1,x2) & v_walk(e1) & n_step(x3) & n_child(x2) & a_little(s2) & Theme(s2,x2) & card_eq_2(x2) & n_child(x1) & a_little(s1) & Theme(s1,x1) & card_eq_2(x1))
exists s1 x4.(n_time(x4) & a_first(s1) & Theme(s1,x4) & all x1.(n_plane(x1) -> exists x2 x3.(a_topic(x2) & for(x2,x4) & for(x2,x1) & n_board(x2) & of(x2,x3) & n_child(x3) & card_eq_2(x2))))