Complex sentence: Marita reports on the events in Kazahkstan to the Syndicate, which is surprised about the deaths of the abductees found there, believing that colonization is at least fifteen years away.
Split into simpler sentences: Marita reports on the events in Kazahkstan to the Syndicate. The Syndicate is surprised at the deaths of the group abductees found, believing that colonization is at least 15 years away.