Misc: Name the condiment which is excellent for cleaning brass?

Questions

Childrens songs, sing a song of sixpence,what was the queen eating?

Childrens songs, sing a song of sixpence,where was the maid?

Childrens songs, the grand old duke of york, had how many men?

What London art gallery is named after a manufacturer of artificial silk?

Who is the Big Yin?