Who was team 1 when the chalkheads were team 2?
CREATE TABLE table_18733480_1 (team_1 VARCHAR, team_2 VARCHAR)
SELECT team_1 FROM table_18733480_1 WHERE team_2 = "Chalkheads"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_18733480_1 (team_1 VARCHAR, team_2 VARCHAR) Question: Who was team 1 when the chalkheads were team 2? [/INST] SELECT team_1 FROM table_18733480_1 WHERE team_2 = "Chalkheads" </s>