There's a type error in overview description. Its Which, not witch.
I'm late to the party, for sure, but since it still hasn't been changed, I figured I'd mention the other mistake. "A" is used when the following word starts with a letter that makes the sound of a consonant. "An" is used when the following word starts with a letter that makes the sound of a vowel. In this case, a number came after it. That number starts with a consonant sound. The sentence should be "a 20 year old woman", instead of "an 20 year old girl" (also changing girl to woman, since we're being technical, and "girl" would refer to "not adult", and 17 and under are considered kids. lol
