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_22662 ( "Doctor" text, "Season" text, "Story no." text, "Serial" text, "Number of episodes" text, "Total footage remaining from missing episodes (mm:ss)" text, "Missing episodes with recovered footage" text, "Country/Territory" text, "Source" text, "Format" text, "Total footage (mm:ss)" text )

### Question ###
When a private individual is the source and 018 is the story number what is the total footage remaining from missing episodes (mm:ss)?

### Accurate SQL ###

SELECT "Total footage remaining from missing episodes (mm:ss)" FROM table_22662 WHERE "Story no." = '018' AND "Source" = 'Private individual'