I am using \index{} to populate \placeindex (an index) with items.

I am wondering if there is any syntax that allows one \index{} command to define more than one entry, for example, something like this:

\index{presidents+Lincoln, Abraham; Lincoln, Abraham}
The result is two appearances in the index:

LLincoln, Abraham
Ppresidents    Lincoln, Abraham
Is there some syntax for making this possible, without calling \index{} multiple times?
--Joel