CREATE TABLE table_17196 ("Unit" TEXT, "Commander" TEXT, "Complement" TEXT, "Killed" TEXT, "Wounded" TEXT, "Missing" TEXT)

What was the missing for lieutenant general sir thomas picton?
SELECT "Missing" FROM table_17196 WHERE "Commander" = 'Lieutenant General Sir Thomas Picton'
SELECT "Missing" FROM "table_17196" WHERE "Commander" = 'Lieutenant General Sir Thomas Picton'