Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_7600 ( "Mission name" text, "Lunar lander" text, "Lunar landing date" text, "Lunar blastoff date" text, "Lunar landing site" text, "Duration on lunar surface" text, "Crew" text, "Number of s EVA" real, "Total EVA Time (HH:MM)" text )

### Question ###
What is the average number of EVA for the Orion?

### Accurate SQL ###

SELECT AVG("Number of s EVA") FROM table_7600 WHERE "Lunar lander" = 'orion'