A couple holds up their child on a series of large steps while others are also traversing the steps.
A one year old climbs his first stairs.
We do not know if the child is one year old, nor do we know if this is his first set of stairs.
exists e1 p1 s1 s2 x1 x2 x3 x4.(exists e2 s3 x5.(a_also(s3) & Manner(e2,s3) & Theme(e2,x4) & Actor(e2,x5) & v_traverse(e2) & -(x5 = x1) & n_person(x5)) & n_step(x4) & n_step(x4) & n_person(x1) & while(e1,p1) & on(e1,x3) & of(x3,x4) & a_large(s2) & Theme(s2,x4) & n_series(x3) & a_up(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_hold(e1) & n_child(x2) & of(x2,x1) & n_thing(x1) & n_couple(x1))
(x)