CREATE TABLE "table1_23537091_1" (
  "copper_age" text,
  "chalcolithic_4500_bc_3300_bc" text,
  "early_chalcolithic" text,
  "4500_bc_4000_bc" text,
  "ubaid_period_in_mesopotamia" text
);

Question: When middle assyrian empire is the ubaid period in mesopotamia what is the copper age?
SQL: SELECT "copper_age" FROM "table1_23537091_1" WHERE "ubaid_period_in_mesopotamia"='Middle Assyrian Empire';

Question: When hittite old kingdom , minoan eruption is the  ubaid period in mesopotamia what is the copper age?
SQL: SELECT "copper_age" FROM "table1_23537091_1" WHERE "ubaid_period_in_mesopotamia"='Hittite Old Kingdom , Minoan eruption';

Question: When hittite middle kingdom , new kingdom of egypt is the ubaid period in mesopotamia how many early chalcolithics are there?
SQL: SELECT COUNT("early_chalcolithic") FROM "table1_23537091_1" WHERE "ubaid_period_in_mesopotamia"='Hittite Middle Kingdom , New Kingdom of Egypt';

Question: When the second intermediate period of egypt is the  ubaid period in mesopotamia how many early calcolithics are there?
SQL: SELECT COUNT("early_chalcolithic") FROM "table1_23537091_1" WHERE "ubaid_period_in_mesopotamia"='Second Intermediate Period of Egypt';