Complex sentence: She danced with White Oak from 1998 until 2002, then performed with Twyla Tharp Dance from 2001 until 2003 and has been with Yvonne Rainer since 2005.
Split into simpler sentences: She danced with White Oak from 1998 until 2002, then performed with Twyla Tharp Dance from 2001 until 2003. She has been with Yvonne Rainer since 2005.