Complex sentence: Initially reluctant to return to his previous life as a scientific investigator, Demwa agrees to attend a secret meeting, At which he learns that there are "ghosts" appearing in the Sun's Chromosphere.
Split into simpler sentences: Initially reluctant to return to his previous life as a scientific investigator, Demwa agrees to attend a secret meeting. At the meeting, Demwa learns that there are "ghosts" appearing in the Sun's Chromosphere.