Complex sentence: The situation is different in pro-drop languages, such as Italian, which do not require dummy pronouns: the Italian "Piove" ("rains "), which has no overt subject, is semantically identical to the English"It's raining".
Split into simpler sentences: The situation is different in pro-drop languages, such as Italian, which do not require dummy pronouns. The Italian "Piove" ("rains "), which has no subject, is semantically identical to the English"It's raining".