Second Noun? [Inform 6]

I’m missing this in the manual. How do I refer to the second noun a player types?

For example, the first noun is NOUN:

ex: if (noun == WINDOW) then { …

How can I find the second noun typed in a command?

ex: Hit WINDOW with HAMMER.
ex: Hit WINDOW with FIST.

How can I find HAMMER or FIST in those command?

Going by §6 of the DM4, I think it’s “second”.