A person riding a sled down a snowy slope.
A boy riding his new sled down a hill.
we don't know if the person is a boy or girl and his sled might be old not new
exists e1 s1 x1 x2 x3 x4.(a_topic(x1) & down(e1,x4) & n_slope(x4) & a_snowy(s1) & Theme(s1,x4) & Theme(e1,x3) & Actor(e1,x2) & v_ride(e1) & n_sled(x3) & (x1 = x2) & n_person(x1))
exists e1 s1 x1 x2 x3 x4.(a_topic(x1) & down(e1,x4) & n_hill(x4) & Theme(e1,x3) & Actor(e1,x2) & v_ride(e1) & n_sled(x3) & a_new(s1) & Theme(s1,x3) & of(x3,x1) & n_male(x1) & (x1 = x2) & n_boy(x1))