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_name_18 (date__from_ VARCHAR, traction_type VARCHAR, location VARCHAR)
### Question:
what is the date for traction type electric with calgary location?
### Answer:
SELECT date__from_ FROM table_name_18 WHERE traction_type = "electric" AND location = "calgary"