When the relative pronoun is the object of a preposition, which is used instead of that, for example,  in which ,  for which ,  about which ,  through which , etc. (please see the third example below): Formal English: This is the man to whom I wanted to speak and whose name I had forgotten.he relative pronoun that can only be used in restrictive clauses. It can also be substituted for who (referring to persons) or which (referring to things) in informal English. Whereas that is often used while speaking, who and which are more common in formal written English.
For other uses, see Yellowstone (disambiguation). Yellowstone National Park is a national park located in the U.S. states of Wyoming, Montana and Idaho. It was established by the U.S. Congress and signed into law by President Ulysses S. Grant on March 1, 1872. Yellowstone was the first National Park in the U.S. and is also widely held to be the first national park in the world.
Gateway Towns to Yellowstone National Park. Towns nearest Yellowstoneâs five entrances include West Yellowstone, Montana; Jackson Hole, Wyoming; Cody, Wyoming; Cooke City, Montana; and Gardiner, Montana. Each town has its own character and history.ven though the official address is to the state of Wyoming, Yellowstone is actually in three states. The majority of the Park (96%) is in Wyoming. A small section of the Park (3%) to the north and northwest is in Montana. And a small section of the Park (1%) to the west is in Idaho.