Which episodes did Nelson McCormick direct?
CREATE TABLE table_17355820_1 (written_by VARCHAR, directed_by VARCHAR)
SELECT written_by FROM table_17355820_1 WHERE directed_by = "Nelson McCormick"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_17355820_1 (written_by VARCHAR, directed_by VARCHAR) Question: Which episodes did Nelson McCormick direct? [/INST] SELECT written_by FROM table_17355820_1 WHERE directed_by = "Nelson McCormick" </s>