In this task, you are given a context tweet, a question and corresponding answer of given question. Your task is to classify given passage into two categories: (1) "yes" if the given context is useful in answering the question, and (2) "no" if the given context is not useful.

[EX Q]: Context: HMS Lancaster, known as the 'Queen's Frigate', sent a message of congratulations to @KensingtonRoyal on the new birth Royal Navy (@RoyalNavy) May 2, 2015 Question: what is the hms lancaster known as? Answer: the queen's frigate
[EX A]: yes

[EX Q]: Context: "Snakes shed their skin to allow for further growth and to remove parasites that may have attached to their old skin." #TS6ISCOMIMGhttps:// Katie Krause (@Katie_Krause) August 21, 2017 Question: what month was this tweet posted? Answer: january
[EX A]: no

[EX Q]: Context: @joshlevscnn Sometimes I wish we could dissolve our govt and start all over like other countries.#fiscalcliff #startfromscratch— Robert Bales (@trebor219) December 31, 2012 Question: where is this angry crowd? Answer: ferguson
[EX A]:
no