Rule reminder

In Italian newspaper writing: (1) 'preposition + il quale' is preferred over 'prep + cui' for complex sentences; (2) 'il cui / la cui / i cui / le cui' is used for possession; (3) 'chi' appears in proverbial or generalizing statements; (4) 'in cui' and 'dove' alternate for place; (5) 'il quale' can replace 'che' (subject/object) to avoid ambiguity.