Russian dataset for the thread reconstruction

The dataset for thread reconstruction task, which is the task where chat messages should be connected in such a way that they construct a meaningful conversation threads. The source of the chats is the Telegram messenger. These data were annotated using Label Studio v 1.7.2. There are four files: * `raw_config/config_*` - the initial config files to annotation. * `project-*` - annotated data. For more info, see the README.md file in the dataset and corresponding paper.