How many previous years did Maebashi Ikuei high school have a total number of 1 participation?
CREATE TABLE table_2518850_4 (year_of_previous_participation VARCHAR, total_number_of_participation VARCHAR, high_school_name VARCHAR)
SELECT COUNT(year_of_previous_participation) FROM table_2518850_4 WHERE total_number_of_participation = 1 AND high_school_name = "Maebashi Ikuei"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_2518850_4 (year_of_previous_participation VARCHAR, total_number_of_participation VARCHAR, high_school_name VARCHAR) Question: How many previous years did Maebashi Ikuei high school have a total number of 1 participation? [/INST] SELECT COUNT(year_of_previous_participation) FROM table_2518850_4 WHERE total_number_of_participation = 1 AND high_school_name = "Maebashi Ikuei" </s>