add logging of filtering statistics
cleanup
eliminate all "di" preposition variants: just use one and let morphology modify it
add "essi" and "esse" disjunctive pronouns
add "madre (mother)"
morphology of preposition "di" + NP (e.g. "di il mio zio" => "di mio zio")
fix misspelling in "ricco (rich)"
re-enable expansions that were commented out for debugging
add VP -> <essere> <adjective> sentences
fix "madre (mother)" (needs nested :english and :italian in order to conjugate properly)
:pred for "a (to)" should be in italiano (:a, not :to)
andare subcats for a an "a (to)-headed" prepositional phrase