Short articles, prevailing on the channel, can be a good choice for 'Hello ap' if they’re going to gain their audience’s sympathy with brevity. Also, there are a few medium-length pieces.
Intermediate readability level is common for 'Hello ap' articles as it addresses the matters that demand certain level of education to be understood. Sometimes the channel gets even more difficult by issuing pieces of advanced readability level (they make up more than one third of all content). In addition the channel contains some materials of a basic readability level.
Neutral sentiment normally indicates an unbiased attitude that prevails in the channel’s articles (e.g. it may include some kind of scientific or professional materials).