Assertion: chat room's user | /r/CapableOf | post message
Facets:
Source sentences:
text: Forums and discussion groups, in comparison, allow users to post messages but don't have the capacity for interactive messaging.
text: The forums and discussion groups available in online chat messenger windows allow users to post messages but don't have the capacity for interactive messaging.
text: Users must be Members of a chat room to be able to post and read messages.