browser's Help section.
a ItsIt's hot.
b The poor cat! ItsIt's paw has a thorn in it.
c TheirsThere'sTheres a dog over there.
d It's not theirstheresthere's, itsit's mine.
e This is not my book, itsit's your'syours.
f The dog hasn't eaten it'sits bone. I think it'sits buried the horrible thing.