Two little children are walking up some steps to get into an airplane.
A man and a woman walked hand in hand up an airplane stairs getting ready to board
It is implied that there are only two little children,and there is no  implication they were walking hand and hand getting ready to board the airplane. Also not implied that they were airplane stairs.
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 e1 e2 p1 x1 x2 x3 x4 x5 x6 x7.(exists e3 p2.(exists s1 x8.(to(s1,x8) & n_board(x8) & Theme(s1,x1) & a_ready(s1)) & Topic(e3,p2) & Actor(e3,x1) & v_get(e3)) & Topic(e2,p1) & Actor(e2,x1) & v_stair(e2) & subset_of(x3,x1) & in(e1,x6) & up(x6,x7) & n_airplane(x7) & n_hand(x6) & Time(e1,x5) & n_hand(x5) & Actor(e1,x4) & v_walk(e1) & (x3 = x4) & n_woman(x3) & subset_of(x2,x1) & n_man(x2))