Premise: Prince Mieszko, leader of the Piast dynasty that ruled the Polonians, undertook the bold step to unify the Polanie (literally, people of the fields ) and neighboring tribes.

Hypothesis: Leader of the Piast dynasty that ruled the Polonians, Prince Mieszko undertook the bold step to unify the Polanie (literally, people of the fields) and neighboring tribes.
Relation: entailment