On what surface was the tournament with opponents kathleen horvath marcella mesker in the finals?
CREATE TABLE table_name_1 (surface VARCHAR, opponents_in_the_final VARCHAR)
SELECT surface FROM table_name_1 WHERE opponents_in_the_final = "kathleen horvath marcella mesker"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_name_1 (surface VARCHAR, opponents_in_the_final VARCHAR) Question: On what surface was the tournament with opponents kathleen horvath marcella mesker in the finals? [/INST] SELECT surface FROM table_name_1 WHERE opponents_in_the_final = "kathleen horvath marcella mesker" </s>