Table 1.

List of acceptable components in a tweet. For each example, we bold the described component within the tweet

Component	Description	Example Tweet
Hashtag	Metadata tags are used to allow a user to apply dynamic user-generated keyword tags. Hashtag are introduced by the hash symbol “#”. It is then followed with the hashtag context which comprises of one or more keywords.	Damn!!! Out cold!! Awesome knockout @KingMoFH#BellatorMMA RT @ConcussHealth: RT @keithmxatc: Offseason #concussion woes of NFL players a scary reminder of a serious problem | Shutdown Corner’
Mentions	Mentions are citations to a specific twitter user via their username. It allows authors to mention a specific user in their tweet, providing more visibility of the tweet to the mentioned user. Mentions are identified by their preceding “@” prior to the username.	@The_Meek while playing “the hockeys” last night I took a puck to the head. It was epic. I think I’m concussed. @TSNBobMcKenzie why not? Hit to the head, right. #shannysajoke
URLs	Emoticons are emotion icons that provide a pictorial representation of a facial expression and allow users to express a feeling or mood. They are formed using punctuation marks, numbers and letters.	got a slap shot to the head with no helmet, got the biggest headache :’( RT @Mike_Davis125: Won my fight by RNC he went out cold! Yay and still champion 8 wins in a row :) #mma #ufc #champion http://t.co/KdMGOZ5wÆ’
Emoticons	URLs are links They are commonly linked to a photo, Gif, or video relating to the content of the tweet.	Steelers erred on the side of caution with concussion in 2009: The defending Super Bowl champions were against... http://t.co/DlT4aSB0tV No suspension for this? Are you kidding me? Its a hit to the head! http://t.co/ffpFGD23MX