Premise: Bulgaria . In December 1989 the ruling Communist Party allowed multi-party elections , which subsequently led to Bulgaria 's transition into a democracy and a market-based economy . The strongest sectors of the economy are heavy industry , power engineering , and agriculture , all of which rely on local natural resources . Bulgaria is a unitary parliamentary republic with a high degree of political , administrative , and economic centralisation .
Hypothesis: Bulgaria has an economic system.
Label: ENTAILMENT