 Complete the following phrase:  Grebenchuks career briefly flourished in 1989 and 1990. She emerged as a fast runner in her mid-twenties after running a best of 1:57.89 minutes in 1987 ranked twelfth globally and then 1.58.70 minutes in 1988 ranked 25th. Her first and only national title came at the 1989 Soviet Indoor Athletics Championships, where she topped the podium in 2:02.62 minutes. International success followed: the 