Is there a rule that 'which' cannot modify words in prepositional phrases. For example:<br/><br/>The button of my shirt, which was washed today, is broken.<br/><br/>What would 'which' in the above case modify? It is 'intended' to modify 'shirt', but can it (since 'shirt' is in the prepositional phrase).<br/><br/>Thanks,<br/>Bharosey.