Question: The Denkova-Staviski Cup is an annual international figure skating competition named after two-time World champion ice dancers Albena Denkova, and Maxim Staviski, a Russian-born naturalized Bulgarian ice dancer, Denkova is related to her, in which two ways?
Sentence (from "Denkova-Staviski Cup"): In some years the senior event is part of the ISU Challenger Series.
Relevant evidence: No