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_66 (date__from_ VARCHAR, location VARCHAR)
### Question:
On what date did the event at Zaltbommel begin?
### Answer:
SELECT date__from_ FROM table_name_66 WHERE location = "zaltbommel"