question: What was the sole territory that the empire kept in the Balkans after 1913 ?
answer: East Thrace ( European Turkey )
turker_answer: East Thrace , also known as European Turkey was the sole territory that the empire kept in the Balkans after 1913 .
rule-based: The sole territory that the empire kept in the Balkans after 1913 was East Thrace ( European Turkey .