A winter sleigh ride with Santa.
There is someone with Santa.
A sleigh ride with Santa means someone is with him.
exists x1 x2 x3 x4.(ne_geo_santa(x4) & a_topic(x1) & with(x1,x4) & n_ride(x1) & of(x1,x3) & n_sleigh(x3) & of(x1,x2) & n_winter(x2))
exists p1 x1 x3.(ne_geo_santa(x3) & exists x2.((x1 = x2) & with(x2,x3) & n_person(x2)))