Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_23537091_1 (early_chalcolithic VARCHAR, ubaid_period_in_mesopotamia VARCHAR)
### Question:
When hittite middle kingdom , new kingdom of egypt is the ubaid period in mesopotamia how many early chalcolithics are there?
### Answer:
SELECT COUNT(early_chalcolithic) FROM table_23537091_1 WHERE ubaid_period_in_mesopotamia = "Hittite Middle Kingdom , New Kingdom of Egypt"