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:

📢 La #OMS informó este lunes que #Washington no ha entregado evidencia para respaldar las "especulaciones" del presidente de #EEUU de que el nuevo #coronavirus se originó en un laboratorio de #China.

https://t.co/xhg2sRlO73