Relative clause and the verb "show"

Hello, Tony—Your examples include ungrammatical commentary like "You need to use 'that' as it follows by a date" and "This option you can used a reduced relative clause instead of finite relative clause." Please explain where that comes from.

Hello David,

sorry for the confusion, I have removed it. That was my comment and Gustavo’s comment from my previous thread.

Can someone shed some lights on the above?

@Tony C posted:

Can someone shed some lights on the above?

The answer to all three questions is "no." The clause introducing the list ("you provided the following documents") indicates that all the items in the list will be a noun phrase (NP): "You provided NP1, NP2, NP3, etc."

Examples (1) and (2) are noun phrases. If you delete "which" in (1) and (2), you will change them into sentences. But sentences cannot function as the complements of "provided" in that sense. Therefore you can't delete "which."

The difference between (3), on the one hand, and (1) and (2), on the other, is that (3) contains a reduced relative clause. Changing "showing" to "shows" will change the noun phrase into a sentence, and (3) will likewise be wrong.