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 georgi grechko
### Answer:
SELECT duration__days_ FROM table_245801_1 WHERE crew = "Georgi Grechko"