You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "who was a in pretty little liars episode?" whose answer is CeCe Drake.
Each document should contain about 30 words, and these documents should contain useful information.

Query: who was a in pretty little liars episode
Useful Output:

Doc 1: Mona is A is seasons 1-2. Cece is the main A in seasons 3-6A. Alex is Uber A from 6B-season 7.
Doc 2: Sara Harvey. The character of Sara took on the role of the Red Coat and Black Widow, both versions of “A.” She was revealed in season
Doc 3: Everyone Who's Ever Been "A" On Pretty Little Liars ; 1 of 7. Mona Vanderwaal (Janel Parrish) ; 2 of 7. Toby Cavanaugh (Keegan Allen) ; 3 of 7.
Doc 4: Pretty Little Liars viewers learned in the series finale Tuesday night that A.D. is Alex Drake — Spencer's British twin sister. 'Pretty Little
Doc 5: Every Character Who Played A In Pretty Little Liars · Original "A" - Mona Vanderwaal · Big "A" - Charlotte DiLaurentis · Uber "A"/A.D. - Alex Drake.