Complex sentence: Shortly after returning from the Asteroid Belt, David "Lucky" Starr learns that hia Science Academy roommate Lou Evans had been sent to investigate trouble on Venus, but the Council of Science office on Venus has requested that he be recalled and investigated for corruption.
Split into simpler sentences: Shortly after returning from the Asteroid Belt, David "Lucky" Starr learns that there is trouble on Venus. His Science Academy roommate Lou Evans had been sent to investigate, but the Council of Science office on Venus has requested that he be recalled and investigated for corruption.