Ideological differences in engagement in public debate on Twitter
An exemplary dummy reply tree (A), along with two reply trees from the data set (B). Each node represents a tweet, and a directed edge between two nodes indicates a reply. If the users of the tweets appear in the retweet network, their replies were color-coded according to the cluster of the user (a black node indicates a reply by a user that does not appear in the retweet network). The root tweet is the original tweet by one of the seed users, while first-order replies are the direct replies to the root tweet.