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_50 (number_of_s_eva INTEGER, lunar_lander VARCHAR)
### Question:
What is the average number of EVA for the Orion?
### Answer:
SELECT AVG(number_of_s_eva) FROM table_name_50 WHERE lunar_lander = "orion"