A little girl still in the carrier that a parent would put on them.
The family is getting ready to leave after a short stay, so they left the baby in her carrier.
A girl in a carrier may not always have a family.  A girl can be left in a carrier whether or not she is getting ready to leave soon.
exists p1 s1 x1 x2.(n_thing(x2) & n_carrier(x2) & a_topic(x1) & exists e1 x3.(on(e1,x2) & Actor(e1,x3) & v_put(e1) & n_parent(x3)) & that(x1,p1) & n_still(x1) & in(x1,x2) & n_girl(x1) & a_little(s1) & Theme(s1,x1))
exists e1 p1 p2 s1 x1 x2 x3 x4.(n_carrier(x4) & of(x4,x3) & n_female(x3) & n_baby(x3) & n_thing(x1) & n_family(x1) & after(e1,x2) & exists e3.(r_so(e3) & in(e3,x4) & Theme(e3,x3) & Actor(e3,x1) & v_leave(e3)) & that(x2,p2) & n_stay(x2) & a_short(s1) & Theme(s1,x2) & exists p3 s2.(Topic(s2,p3) & Actor(s2,x1) & a_ready(s2) & exists e2.(Actor(e2,x1) & v_leave(e2))) & Topic(e1,p1) & Actor(e1,x1) & v_get(e1))