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_18851 ( "Distribution" text, "Compile time buffer checks" text, "Mandatory access control" text, "Software executable space protection" text, "grsecurity" text, "RSBAC" text )

### Question ###
what's the software executable space protection with dbeingtribution being gentoo

### Accurate SQL ###

SELECT "Software executable space protection" FROM table_18851 WHERE "Distribution" = 'Gentoo'