Complex sentence: Mollari later discovered this rumor to be true; it was also around this time that Londo learned that the Vorlons were destroying any planet with even the slightest taint of Shadow influence.
Split into simpler sentences: Mollari later discovered this rumor to be true. It was also around this time that Londo learned that the Vorlons were destroying any planet with even the slightest taint of Shadow influence.