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_245801_1 (duration__days_ VARCHAR, crew VARCHAR)
### Question:
Name the duration for  vladimir vasyutin , alexander volkov
### Answer:
SELECT COUNT(duration__days_) FROM table_245801_1 WHERE crew = "Vladimir Vasyutin , Alexander Volkov"