"If this particular plan has been shut down, which it obviously has been, I hope they keep trying to change the layout of the park. "<br/><br/>Hello, I don't understand the grammar in the clause "which it obviously has been". I need your kind help:<br/><ul><br/><li>at first, what is it the word "which" represent?</li></ul>-&gt;if "which" = "this particular plan", why an "it" is added after "which"?<br/><br/>-&gt;so, "which" = "shut down" ?<br/><br/>Thank you in advance.