Swiętopełk received Pomerelia as vassaldom from his suzerain , the Polish High Duke Leszek I the White of the Piast dynasty in 1216 or 1217 .
NOUN VERB PROPN ADP NOUN ADP PRON NOUN , DET PROPN PROPN PROPN PROPN PRON DET PROPN ADP DET PROPN NOUN ADP NUM CCONJ NUM .