Statement: olga govortsova has won at least one grand slam tournament match in any given year from 2007 - 2011

Input Table: olga govortsova

Step 1: Select rows where 'tournament' is 'grand slam tournaments'.
tournament c_2007 c_2008 c_2009 c_2010 c_2011
grand slam tournaments 9999-01-01 9999-01-01 9999-01-01 9999-01-01 9999-01-01
australian open 2023-09-20 9999-01-01 9999-01-01 9999-01-01 9999-01-01
french open 2023-09-20 9999-01-03 9999-01-03 9999-01-02 9999-01-02
wimbledon 9999-01-02 9999-01-01 9999-01-02 9999-01-01 9999-01-01
us open 9999-01-02 9999-01-02 9999-01-01 9999-01-01 9999-01-01
win - loss 9999-02-02 9999-03-04 9999-03-04 9999-01-04 9999-01-04
olympic games 9999-01-01 9999-01-01 9999-01-01 9999-01-01 9999-01-01
summer olympics 9999-01-01 9999-01-01 9999-01-01 9999-01-01 9999-01-01
year - end championship 'year - end championship' is not a valid date format. please provide a valid date format in order to convert it to a standardized format. 'year - end championship' is not a valid date format. please provide a valid date format in order to convert it to a standardized format. 'year - end championship' is not a valid date format. please provide a valid date format in order to convert it to a standardized format. 'year - end championship' is not a valid date format. please provide a valid date format in order to convert it to a standardized format. 'year - end championship' is not a valid date format. please provide a valid date format in order to convert it to a standardized format.
wta tour championships 2023-09-20 2023-09-20 2023-09-20 2023-09-20 2023-09-20
wta premier mandatory tournaments 9999-01-01 9999-01-01 9999-01-01 9999-01-01 9999-01-01
indian wells 2023-09-20 2023-09-20 9999-01-02 9999-01-02 9999-01-01
miami 2023-09-20 9999-01-01 9999-01-01 9999-01-01 9999-01-01
madrid 9999-01-01 9999-01-01 9999-01-01 9999-01-02 2023-09-20
beijing 9999-01-01 9999-01-01 9999-01-01 9999-01-02 9999-01-01
wta premier 5 tournaments 9999-01-01 9999-01-01 9999-01-01 9999-01-01 9999-01-01
dubai 9999-01-01 9999-01-01 9999-01-01 9999-01-03 2023-09-20
rome 2023-09-20 9999-01-02 2023-09-20 9999-01-01 9999-01-01
cincinnati 9999-01-01 2023-09-20 9999-01-02 9999-01-02 9999-01-01
montréal / toronto 2023-09-20 2023-09-20 2023-09-20 9999-01-01 9999-01-01
tokyo 2023-09-20 2023-09-20 2023-09-20 9999-01-02 2023-09-20
year end ranking 9999-01-49 9999-01-49 9999-01-52 9999-01-74 9999-01-14

Step 2: Select rows where 'c_2007' is not '9999-01-01' or 'c_2008' is not '9999-01-01' or 'c_2009' is not '9999-01-01' or 'c_2010' is not '9999-01-01' or 'c_2011' is not '9999-01-01'.
tournament c_2007 c_2008 c_2009 c_2010 c_2011
grand slam tournaments 9999-01-01 9999-01-01 9999-01-01 9999-01-01 9999-01-01

Step 3: Use a `CASE` statement to return TRUE if the number of rows is greater than or equal to 1, otherwise return FALSE.
tournament c_2007 c_2008 c_2009 c_2010 c_2011

Final output table:
verification_result
FALSE

Prediction: FALSE