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:

Today, the first astronaut, Yuri Gagarin, would have turned 86. He realized the dreams of millions of people about space exploration. #Gagarin #space #Russia #astronaut https://t.co/wcEWqlKANC