Complex sentence: Biryukova entered the junior grand prix in the 2009 as part of the 2009-2010 season and seniors in 2010 at the Cup of Russia as part of the 2010-2011 season.
Split into simpler sentences: Biryukova entered the junior Grand Prix as part of the 2009-2010 season and moved up to seniors in 2010. She made her senior debut at the 2010 Cup of Russia as part of the 2010-2011 season.