Use vs. Mention

Domain:: Linguistics

Canonical Formulation:

Possible Formulation:

Examples:

Use:
Puccini was an Italian.
Jesus Christ appeared to the apostles.
It is raining.
There are many parts in a steam engine.

Mention:
Puccini spells (the word) italian with seven letters.
(The name) Jesus Christ appears in the Bible.
(The sentence) "It is raining" is the third example in the 'USE' list.
(The name) Steam engine is composed of two parts.

Classical Challenge: ?