Table: ittf_pro_tour_winners_4
Columns: year_location
mens_singles
womens_singles
mens_doubles
womens_doubles

Question: Who won the Womens Singles in the year the Jean-Michel Saive won the Mens Singles?
SQL: SELECT "womens_singles" FROM ittf_pro_tour_winners_4 WHERE "mens_singles" = 'Jean-Michel Saive'

Question: In what year and location did Liu Guozheng win the Mens Singles?
SQL: SELECT "year_location" FROM ittf_pro_tour_winners_4 WHERE "mens_singles" = 'Liu Guozheng'

Question: In what year and location did Wang Liqin win the Mens Singles?
SQL: SELECT "year_location" FROM ittf_pro_tour_winners_4 WHERE "mens_singles" = 'Wang Liqin'