Answer:
What is the middle of water but is not an island?
When is 1500 plus 20 and 1600 minus 40 the same thing?
Nothing specific, but more than a few. This many clustered, together will do.
What gives life and love, and is there till they die? What can hide you and find you, heal you and feed you but should never give up on you?
The distance from the top of your head to the floor standing up straight.
What language does a billboard speak?