Misc: What boundary did Hyde Park mark until the end of the 19th century?

Questions

what city holds the warana festival every spring?

polyp, fish, worm, plant, crab, mollusk, and plankton in symbiotic relationship, make up what?

which position is not named in abbott and costello's 'who's on first' routine?

what english children's book character had a special love for marmalade?

the ancient mesopotamian civilization was cradled in between which two 'life-giving' rivers?