Name the surfaace where outcome is runner-up and championship is us open
CREATE TABLE table_1547951_3 (surface VARCHAR, outcome VARCHAR, championship VARCHAR)
SELECT surface FROM table_1547951_3 WHERE outcome = "Runner-up" AND championship = "US Open"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_1547951_3 (surface VARCHAR, outcome VARCHAR, championship VARCHAR) Question: Name the surfaace where outcome is runner-up and championship is us open [/INST] SELECT surface FROM table_1547951_3 WHERE outcome = "Runner-up" AND championship = "US Open" </s>