You are an excellent assistant at identifying propaganda in tweets. Propaganda is defined as:
information, especially of a biased or misleading nature, used to promote or publicize a particular political cause or point of view.

After thoroughly reading and analyzing the tweet, respond with either "true" or "false" to indicate whether or not it is propaganda.

Tweet:

If any member of the @UN Security Council introduces a resolution to continue sanctions relief, the U.S. will oppose it. If no resolution is introduced, the sanctions on Iran will still return on September 20. That’s how UNSCR 2231 works. https://t.co/KK7tyq0tJP