YOU SAID:

You aren't sure what the ceiling is made of, probably stucco.

INTO JAPANESE

天井が何でできているかわかりませんが、おそらく漆喰です。

BACK INTO ENGLISH

I don't know what the ceiling is made of, but it's probably plaster.

INTO JAPANESE

天井が何で出来ているかは分かりませんが、おそらく漆喰でしょう。

BACK INTO ENGLISH

I don't know what the ceiling is made of, but it's probably plaster.