CREATE TABLE table_6266 ("Episode" TEXT, "Title" TEXT, "Writer ( s ) " TEXT, "Preservation" TEXT, "Original airdate" TEXT)

Has Episode 1b-16 (42) been preserved?
SELECT "Preservation" FROM table_6266 WHERE "Episode" = '1b-16 (42)'
SELECT "Preservation" FROM "table_6266" WHERE "Episode" = '1b-16 (42)'