Conversation so far:
Did Constantin Stere live in Siberia?
In 1885, he was deported to Siberia, serving a three-year term.
What did Constantin Stere have to do with Siberia?
In 1885, he was deported to Siberia, serving a three-year term.
What did Constantin Stere do to get sent to Siberia?
Stere and Kogan-Bernstein engaged in revolutionary politics as socialists and Narodniks, initiating a conspirative self-instruction cell of six inside their school. Stere declared his opposition to a Social democratic program

Question: Why was he deported to Siberia?
Self-contained rewrite: Why was Constantin Stere deported to Siberia?