See:

http://random-idea-english.blogspot.com/2012/03/exploring-co...

http://www.brushup.eu/connective-relative-clauses/#:~:text=C...

Une possibilité.

http://www.taalportaal.org/taalportaal/topic/link/syntax__Du...

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Note added at 54 mins (2021-01-06 11:21:04 GMT)
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This section discusses relative constructions containing more than one relative clause. The relative clauses in such constructions can be stacked, nested or coordinated. Some examples are given in (362). In example (362a), the two subclauses are stacked: as indicated by the indices, the first relative clause modifies the antecedent student'student', while the second relative clause modifies the sequence student die hiernaast woont'student who lives next door'. Such constructions differ from cases of nesting, illustrated in (362b), where the second relative clause modifies a noun phrase contained in the first relative clause. Both types of construction differ from cases of simple coordination of relative clauses, as in (362c), where each relative clause modifies the same antecedent. As we will see in the following subsections, stacking of relative clauses is fully acceptable only with restrictive relative clauses (as in example (362a)); coordination and nesting are possible both with restrictive and with non-restrictive relative clauses.
Example 362
a. De [[studenti [dieihiernaast woont]]j [diej Engels studeert]] komt uit Japan.
the student who next.door lives who English studies is from Japan
'The student who lives next door who studies English, is from Japan.'
b. De studenti [dieinet een boekj kocht [datj over WO II gaat]] is mijn vriend.
the student who just a book bought which about WW II goes is my friend
'The student who has just bought a book which is about WW II is my friend.'
c. De mani [dieihier net was] en [dieiRussisch sprak] is een bekend schrijver.
the man who here just was and who Russian spoke is a well-known writer
'The man who was just here and who spoke Russian is a well-known writer.'Subsection I will discuss stacking and coordination of relative clauses of the same type. Subsection II will continue by discussing nesting of restrictive and non-restrictive relative clauses. Subsection III, finally, will consider constructions containing relative clauses of different types, that is, combinations of a restrictive and a non-restrictive relative clause.
I. Stacking and coordination of relative clauses
A. Restrictive relative clauses
B. Non-restrictive relative clauses
II. Nesting of restrictive and non-restrictive relative clauses
III. Mixed constructions with restrictive and non-restrictive relative clauses


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Note added at 5 hrs (2021-01-06 15:42:10 GMT)
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Task B - indirectly nested clauses (i) - relative clauses (RCls)www.lancaster.ac.uk › stylistics › topic7 › 9nesting2
We have now seen that Noun clauses, Adverbial clauses and Prepositional clauses can all be directly nested (embedded) inside main clauses (i.e. comprise a whole SPOCA element within the main clause). We also need to take account of the fact that clauses can be indirectly nested inside main clauses.