What medium was used for the sculpture by Ernest Richard Gause? 
CREATE TABLE table_20903658_1 (medium VARCHAR, artist VARCHAR)
SELECT medium FROM table_20903658_1 WHERE artist = "Ernest Richard Gause"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_20903658_1 (medium VARCHAR, artist VARCHAR) Question: What medium was used for the sculpture by Ernest Richard Gause?  [/INST] SELECT medium FROM table_20903658_1 WHERE artist = "Ernest Richard Gause" </s>