CREATE TABLE table_6586 ("Release date" TEXT, "Length" TEXT, "Director ( s ) " TEXT, "Character name" TEXT, "Character type" TEXT, "Leading lady" TEXT)

What is the length of the film with Burleigh Sullivan as the character?
SELECT "Length" FROM table_6586 WHERE "Character name" = 'burleigh sullivan'
SELECT "Length" FROM "table_6586" WHERE "Character name" = 'burleigh sullivan'