The conversation between human and AI assistant.
[|Human|] Given a reference text about Gennady Petrovich Lyachin, tell me when he joined the navy and when he was decommissioned.
[|AI|] Gennady Petrovich Lyachin joined the Navy in 1972 and was decommissioned in 1991 after the fall of the Soviet Union.
[|Human|] 
Given a reference text about Gennady Petrovich Lyachin, tell me when he joined the navy and when he was decommissioned.