what is the surface when the opponents are louise field nathalie herreman?
CREATE TABLE table_name_13 (surface VARCHAR, opponents VARCHAR)
SELECT surface FROM table_name_13 WHERE opponents = "louise field nathalie herreman"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_name_13 (surface VARCHAR, opponents VARCHAR) Question: what is the surface when the opponents are louise field nathalie herreman? [/INST] SELECT surface FROM table_name_13 WHERE opponents = "louise field nathalie herreman" </s>