When middle assyrian empire is the ubaid period in mesopotamia what is the copper age?
CREATE TABLE table_23537091_1 (copper_age VARCHAR, ubaid_period_in_mesopotamia VARCHAR)
SELECT copper_age FROM table_23537091_1 WHERE ubaid_period_in_mesopotamia = "Middle Assyrian Empire"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_23537091_1 (copper_age VARCHAR, ubaid_period_in_mesopotamia VARCHAR) Question: When middle assyrian empire is the ubaid period in mesopotamia what is the copper age? [/INST] SELECT copper_age FROM table_23537091_1 WHERE ubaid_period_in_mesopotamia = "Middle Assyrian Empire" </s>