What party represents the district with incumbent matthew clay?
CREATE TABLE table_2668378_18 (party VARCHAR, incumbent VARCHAR)
SELECT party FROM table_2668378_18 WHERE incumbent = "Matthew Clay"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_2668378_18 (party VARCHAR, incumbent VARCHAR) Question: What party represents the district with incumbent matthew clay? [/INST] SELECT party FROM table_2668378_18 WHERE incumbent = "Matthew Clay" </s>