CREATE TABLE table_28138035_4 (mens_singles VARCHAR, womens_doubles VARCHAR)

Name the mens singles for lee eun-sil moon hyun-jung
SELECT mens_singles FROM table_28138035_4 WHERE womens_doubles = "Lee Eun-Sil Moon Hyun-Jung"
SELECT "mens_singles" FROM "table_28138035_4" WHERE "Lee Eun-Sil Moon Hyun-Jung" = "womens_doubles"