Question: The Qajars defeated the Russians at what battle to take over Tblisi?
Sentence: The Russo-Persian wars of 1804–1813 and 1826–1828 resulted in large irrevocable territorial losses for Iran in the Caucasus, comprising all of Transcaucasia and Dagestan, which made part of the very concept of Iran for centuries, and thus substantial gains for the neighboring Russian Empire.
Answer in sentence: no