How many incumbents resulted in a lost renomination republican gain?
CREATE TABLE table_1341690_18 (incumbent VARCHAR, result VARCHAR)
SELECT COUNT(incumbent) FROM table_1341690_18 WHERE result = "Lost renomination Republican gain"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_1341690_18 (incumbent VARCHAR, result VARCHAR) Question: How many incumbents resulted in a lost renomination republican gain? [/INST] SELECT COUNT(incumbent) FROM table_1341690_18 WHERE result = "Lost renomination Republican gain" </s>